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Home » Recipes

Copycat Recipe Millie's Cookies Giant Iced Cookie Cake

Published: Jan 17, 2015 · Modified: Jan 19, 2021 by Emma · This post may contain affiliate links · 69 Comments

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Here you'll find the recipe for my absolute favourite recipe - a copycat of the Millie's Cookies Giant Iced Cookie Cake.

Tried and tested

Not quite a cookie and not quite a cake my copycat of Millie's Cookies Giant Iced Cookie Cake is a dense, chewy, fluffy cakey delight studded with bitter sweet chocolate chips, iced with vanilla and chocolate buttercream and decorated with rainbow sprinkles. What's not to love?

This recipe has now been on the blog for a good 18 months and in that time it has received A LOT of attention, which you'll see in the comments below. A few people have had a few hiccups along the way to cookie cake perfection but I can assure you that this recipe WORKS as many of my readers will happily tell you!

Just see what Sam said earlier this year:

Made this for hubby’s birthday yesterday and it’s amazing! And dangerously moreish!

And the guys at Platter Talk said:

This is one of my favorite copycat recipes; fun and delicious!

I use this recipe for birthdays, anniversaries, an excuse to bring cookies/cake into the office and I've even done a heart shaped variation for Valentine's Day. The possibilities really are endless and you can decorate it any way you choose!

As close to a Millie's Cookies Giant Iced Cookie as you'll get in your own kitchen!

Top tips

If you're having any trouble with the recipe please don't hesitate to drop me a comment below. But here are a few helpful hints that should help you along the way to Giant Iced Cookie Cake perfection.

  1. Check your oven temperature - it's amazing how much the internal heat can vary from what it says on the dial! I have a handy oven thermometer so I can be sure what temperature I'm cooking at. They are very cheap but worth their weight in gold!
  2. Use butter "sticks" or a butter "block" not the spreadable kind from a tub!
  3. Make sure you use self-raising flour not plain flour or you won't get any rise and the cake will be super dense.
  4. Chill the mix before baking on a hot day. If you find the butter has melted and the mix is a little wetter than you expected chill the mix just like you would a cookie dough before putting it in your tin.

I hope that helps!

Find the recipe below for a cookie-cake as close to a Millie's Cookies Giant Iced Cookie as you'll get in your own kitchen!

The cookie-cake recipe

They key to this recipe is to use a mix of brown and white sugar and to use A LOT of bitter sweet chocolate chips. I find that milk chocolate is just that little bit too sweet. You'll be grateful for the bitterness that the dark chocolate brings.

Giant Iced Cookie Cake

Copycat Recipe Millie’s Cookies Giant Iced Cookie Cake

Emma
This giant cookie cake is part cookie and part cake making it a great alternative to a regular celebration cake!
4.91 from 21 votes
Print Recipe Pin Recipe
Prep Time 10 minutes mins
Cook Time 35 minutes mins
Total Time 45 minutes mins
Course Dessert
Cuisine American
Servings 12 people
Calories 263.76 kcal

Ingredients
 
 

  • 175 grams butter unsalted
  • 100 grams caster sugar
  • 100 grams light brown sugar
  • 2 eggs
  • 1 Vanilla pod seeds only
  • 275 grams self raising flour
  • 250 grams chocolate chips

Instructions
 

  • Beat together the butter and sugar until creamy and light.
  • Add the eggs and vanilla and continue mixing until the eggs are fully incorporated.
  • Next, fold in the flour a little at a time until a stiff batter forms.
  • Finally stir in the chocolate chips before spreading into a large cake tin (no smaller than 10").
  • Bake in the centre of your oven at at 350F or 180C, for 25-35 minutes or until the cookie cake is golden brown and the cookie bounces back in the middle when touched.
  • Decorate with your favourite buttercream and sprinkles!

Notes

Top tip: If you don't have a tin, spread the mixture out evenly on a baking sheet lined with baking parchment. Trim any straggly edges when it comes out of the oven.

Nutrition

Calories: 263.76kcalCarbohydrates: 33.3gProtein: 3.81gFat: 12.98gSaturated Fat: 7.78gTrans Fat: 0.48gCholesterol: 58.63mgSodium: 117.34mgPotassium: 47.62mgFiber: 0.55gSugar: 16.53gVitamin A: 404.5IUCalcium: 17.96mgIron: 0.4mg
Keyword butter, caster sugar, chocolate chips, egg, flour, light brown sugar, vanilla pod
Tried this recipe?Let us know how it was!

When iced in the same style as Millie's Cookies you'd never know that this was cooked at home - until you slice into it that is! It is SO close to the Millie's Cookies Giant Iced Cookie but it is ten times better because its got that extra cakey-ness which takes this from just an oversized cookie to a real show stopper!

Let them eat cake!

Like this? Then you'll love some of the other cakes and bakes I have on the blog.

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Pumpkin Spice Cookies

Vegan Chocolate Chip Cookies 3

Chocolate Tahini Cookies

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These Rolo Stuffed Brownies are oozing sweet caramel in between dark fudgy brownie find the recipe here

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These peanut butter brownies really are the best brownie recipe ever. Sweet, salty and a little bitter they are perfect with a cup of tea or coffee! Get the recipe at Supper in the Suburbs!

Peanut Butter Brownies

This stunning Lemon and Blueberry Layer Cake is the perfect spring celebration! Decorated with beautiful piped buttercream flowers and roses its a showstopping dessert. Get the recipe on Supper in the Suburbs!

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Cake covered in chocolate ganache and topped with truffles, rasbperries and edible flowers 2

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Reader Interactions

Comments

  1. rollcinnamon says

    January 17, 2015 at 11:46 am

    Nice! BUT, because i'm a bad person I cant do grams for biscuit making, only do ounces!

    Reply
    • efwalt says

      January 17, 2015 at 1:00 pm

      Haha that doesn't make you a bad person 🙂 at least there are some good conversion tools out there! I am forever converting cups to grams. I have cup measures but still prefer grams where possible 🙂

      Reply
      • rollcinnamon says

        January 17, 2015 at 1:07 pm

        Me too! Looking back over my 'cooking journey' made me realise that I prefer ratios over all the diverse weighing systems and I found a great book by Michael Ruhlman called unsurprisingly Ratio. It's fab give it a read it really helps your cooking.

        Reply
        • efwalt says

          January 17, 2015 at 2:04 pm

          Oooh sounds interesting I'll have to see if I can hunt down a copy!

          Reply
  2. jasmincharlotte says

    January 19, 2015 at 12:55 pm

    This looks amazing! It is my boyfriends birthday this week and I was looking for something a bit different to bake so I really want to try this. Not sure my piping will be anywhere near as good as yours though!! x

    Jasmin Charlotte | UK Lifestyle Blog

    Reply
    • efwalt says

      January 19, 2015 at 1:19 pm

      Aww fab! If you do give it a go I'd love to see pictures :-D!

      Reply
  3. Platter Talk says

    January 19, 2016 at 1:58 pm

    This is one of my favorite copycat recipes; fun and delicious! Our kids will go gaga over this one; thanks so much for sharing!

    Reply
    • Emma Walton says

      January 19, 2016 at 2:16 pm

      My pleasure I'm glad you like it! It's not only delicious but I'm sure the kids will have a ball customising it too!

      Reply
  4. Gloria @ Homemade & Yummy says

    January 19, 2016 at 5:44 pm

    Wow...that is awesome....you made your own cake. At least you got exactly what you wanted. It's like a birthday present from you to YOU!! Hope you enjoyed it...it looks yummy!!

    Reply
    • Emma Walton says

      January 19, 2016 at 5:54 pm

      Haha thanks Gloria that is certainly one way of looking at it. It really was delicious and fun to make too 🙂

      Reply
  5. Melissa says

    January 19, 2016 at 5:52 pm

    Happy belated birthday! This looks so good! Two of my kids have birthdays next month, I think I know what I'm baking to celebrate!

    Reply
    • Emma Walton says

      January 19, 2016 at 5:55 pm

      Thanks Melissa!!! I'm sure they will love it! Don't forget to go crazy with thr sprinkles - a birthday must!

      Reply
  6. Oana @AdoreFoods says

    January 21, 2016 at 3:17 pm

    Happy belated birthday! This cookie cake sounds like the perfect option to celebrate with! Looks great

    Reply
    • Emma Walton says

      January 21, 2016 at 3:23 pm

      Thanks Oana 🙂

      Reply
  7. Emma Walton says

    March 12, 2016 at 2:38 pm

    Hi dot. Sorry to hear you had some issues! Can you confirm precisely what went wrong. We've made it lots of times and it makes a very dense cookie cake.

    Reply
  8. Sam says

    April 12, 2016 at 8:25 am

    Made this for hubby's birthday yesterday and it's amazing! And dangerously moreish!

    Reply
    • Emma Walton says

      April 12, 2016 at 9:46 am

      Woohoo! Glad you liked it Sam! If you've got a photo I'd love to see the finished product 🙂 hope your hubby had a lovely birthday. All the best x

      Reply
  9. Jodie says

    May 08, 2016 at 5:44 pm

    Is there anything I can use instead of a Vanilla Pod

    Reply
    • Emma Walton says

      May 08, 2016 at 5:46 pm

      Hi Jodie, any vanilla essence or vanilla extract will do just fine! If you leave it out completely it won't be the end of the world 🙂 Enjoy!

      Reply
  10. Rebecca Huff says

    June 17, 2016 at 3:52 pm

    My giant cookie is currently in the oven.......it's not a cookie, it's a cake!
    I don't know what went wrong as I followed the recipe. My batter didn't look like the one in the photo on the blog, it was much wetter.
    I was going to use this recipe for Father's Day, but I'm not sure now.
    Any ideas on what I have done wrong??

    Reply
    • Emma Walton says

      June 17, 2016 at 4:02 pm

      Oh no! Rebecca I'm really sorry to hear that! It is a "cookie cake" so the texture should be somewhere between the two. That being said it most certainly should have been more like a dough than cake batter. How wet and runny was it when it went in? It may be that it comes out more like a cake - hopefully it will still be delicious!

      Reply
      • Rebecca says

        June 17, 2016 at 4:20 pm

        There was nothing doughy about it, more a Victoria Sponge mix. I've baked it for long as it was still slopy in the middle after 35 mins. It looks good, but not what I was looking for.

        Reply
        • Emma Walton says

          June 17, 2016 at 4:31 pm

          I'm gutted for you Rebecca! I can only imagine there wasn't enough flour in the mix cake baking is such a science. If it still needs to cook in the middle I'd recommend covering it in foil to stop it browning and placing it low into the oven until cooked all the way through.

          Reply
  11. Beth says

    June 23, 2016 at 8:58 pm

    Hi there! making this now! did you use melted butter? or just room temp?

    Reply
    • Emma Walton says

      June 23, 2016 at 9:01 pm

      Hi Beth! Butter should be room temp 🙂 enjoy!

      Reply
  12. janeycluff says

    August 02, 2016 at 9:21 am

    Nice idea but i did it exactly as the recipe and cooked it for less than the time suggested and it was like a very over done cake - all sawdusty in texture although the flavour was nice - did i do something wrong???

    Reply
    • Emma Walton says

      August 02, 2016 at 9:41 am

      Hi Janey. What flour did you use? I've not heard anyone say it's sawdusty before! Sorry it didn't turn out quite like you'd hoped.

      Reply
  13. K says

    August 02, 2016 at 12:56 pm

    Mine turned out like a flat cake too

    Reply
    • Emma Walton says

      August 02, 2016 at 1:19 pm

      Hi K. Just want to be clear this is a "cookie cake" as it says in the title. It's neither a cookie nor a cake but a hybrid of the two!

      Reply
      • Sam says

        August 02, 2016 at 1:33 pm

        I've used this recipe numerous times now and it always turns out perfect and totally scrumptious!

        Reply
        • Emma Walton says

          August 02, 2016 at 2:00 pm

          Thanks Sam 🙂 I'm glad you've used the recipe so many times! I'd love to see a photo next time you do! I'm going to be making it again this weekend for a christening 😀

          Reply
  14. Anjali says

    August 02, 2016 at 2:22 pm

    There's nothing better than a giant cookie! Need to try making one for a birthday sometime! My kids would love it!

    Reply
    • Emma Walton says

      August 02, 2016 at 2:32 pm

      Hi Anjali thanks for stopping by! If you do get to make this do send me a pic on twitter or facebook! I'd love to see 😀

      Reply
  15. swayam says

    August 02, 2016 at 3:30 pm

    Hope you had a great day!! and how adorable does that cake look!!?? Perfect way to ring in your bday...

    Reply
    • Emma Walton says

      August 02, 2016 at 4:09 pm

      Thanks Swayam 😀

      Reply
  16. Jenn @ peas and crayons says

    August 02, 2016 at 4:20 pm

    Giant cookies are the best!!!!

    Reply
  17. Sarah @ Champagne Tastes says

    August 02, 2016 at 4:44 pm

    I love the extra tips! I'm not a regular baker so I forget sometimes how technical it all is 🙂

    Reply
    • Emma Walton says

      August 02, 2016 at 4:50 pm

      Thanks Sarah! It really is a science! Weighing the ingredients accurately is so important too. I've never understood why cups are so common in so many recipes! They are much more unreliable. glad you found the section useful 🙂

      Reply
  18. Andrea @ Cooking with Mamma C says

    August 02, 2016 at 4:45 pm

    Yum! Cookie cakes are perfect for so many occasions. And I'm with you...bittersweet chocolate or at least semi-sweet is better than milk chocolate!

    Reply
    • Emma Walton says

      August 02, 2016 at 4:50 pm

      We do often chuck semi-sweet in if that's what we've got to hand! A mix of both is quite nice too 🙂 glad you like the recipe Andrea!

      Reply
  19. Jo says

    September 29, 2016 at 10:05 am

    I made the cookie cake last weekend and it was so good!

    Reply
    • Emma Walton says

      September 29, 2016 at 4:16 pm

      Awwwww glad you enjoyed it Jo 😀 always good to hear feedback

      Reply
  20. Noelle says

    December 20, 2016 at 9:06 pm

    Hi there what chocolate drops would you recommend? Do you mean plain chocolate or dark chocolate?

    TIA x

    Reply
    • Emma Walton says

      December 20, 2016 at 9:22 pm

      Hey there plain or dark will work just fine!

      Reply
  21. Laura Wood says

    February 07, 2017 at 4:17 pm

    How do you make the heart shaped version? Is there a special tin I need to buy or do you bake and stick together afterwards?

    Reply
    • Emma Walton says

      February 07, 2017 at 4:18 pm

      Hi Laura, you can buy heart shaped tins which is the easiest method and the way I have done it in the past - http://www.amazon.co.uk/heart-shaped-cake-tin/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Aheart%20shaped%20cake%20tin

      Though I know a friend who shaped the dough into a heart shape straight on to a baking sheet. You could use rolled up tinfoil to stop it spreading!

      Hope that helps.

      Reply
  22. linda brown says

    February 15, 2017 at 8:30 pm

    Hi I made this yesterday for my husband, I did exactly the same as the recipe said and I found it quite dry and crumbly. What did I do wrong, I will be trying it again sometime though.

    Reply
    • Emma Walton says

      February 15, 2017 at 9:13 pm

      Hi Linda. Which size eggs were you using? Make sure you have large eggs and if its a bit criumbly try adding some milk. Enjoy!

      Reply
      • Linda Brown says

        February 16, 2017 at 2:21 pm

        Ok thank you, I'll have to remember that the next time. I used mixed sized eggs. The mixture seemed quite wet before cooking and it was crumbly when cooked

        Reply
        • Emma Walton says

          February 16, 2017 at 2:25 pm

          The texture is somewhere between an cookie and a cake. Perhaps thats why it has more of a crumb like texture?

          Reply
  23. emma shane says

    March 02, 2017 at 5:52 pm

    I'd love to try this recipe but would like to know how much vanilla extract to use as don't have vanilla pod. Also what is the icing ingredients? Many thanks Emma

    Reply
    • Emma Walton says

      March 02, 2017 at 6:21 pm

      Hi Emma thanks for your comment.

      I'd use a tsp of extract - though it's hard to say as different brands have different strengths!

      For the icing I use the basic mix of 150g butter to 300g icing sugar. You can add a splash of milk if its too thick to pipe.

      For chocolate buttercream, 75g milk chocolate, 200g butter 400g icing sugar 4 tbsp cocoa powder. Whisk together the butter, icing sugar and cocoa powder then melt the chocolate (let it cool down) and then mix into the buttercream.

      Hope that helps!

      Reply
  24. Leila says

    July 29, 2017 at 10:46 pm

    Hi, how many calories would he while cake contain??

    Reply
    • Emma Walton says

      July 30, 2017 at 10:27 am

      Hi Leila. I'm afraid I'm not able to calculate calorie content as it will decide on a number of different factors. The short answer is ALOT!

      Reply
  25. Hannah Barrot says

    September 16, 2017 at 8:31 am

    Making this for the fourth time now. I've done it for my sons birthday, my husbands and my work and now I'm making it for my parents golden wedding anniversary! The cookie is always a real winner. Thanks so much for sharing the recipe

    Reply
    • Emma Walton says

      September 18, 2017 at 8:54 am

      Awww Hannah! Messages like these really make my day 😀 thank you so much. I'm pleased you love the recipe. Do you have any photos?! I'd love to pull together a gallery of readers making my recipes 🙂

      Reply
  26. Heather says

    May 05, 2018 at 4:02 pm

    Fab recipe..... my son didn't want a cake for his birthday but loves cookies so I made this....It went down very well....

    Reply
  27. Baking1234 says

    January 02, 2019 at 9:44 am

    Hey I am planning to make this and wanted some help with the buttercream for decoration. Was this home made? If so could you advise?

    Reply
    • Emma Walton says

      January 02, 2019 at 10:15 am

      Hi there! It certainly was homemade. The best ratio is 2:1 icing sugar to butter. So for 200g icing sugar use 100g of butter. I also add in some vanilla paste and a splash of milk until it's a good piping consistency.

      For chocolate buttercream swap out some of the icing for cocoa powder 🙂 enjoy!

      Reply
      • Baking1234 says

        January 07, 2019 at 1:01 pm

        Hey thanks for the help with the buttercream. Could I use a tart tin to bake this in?

        Reply
        • Emma Walton says

          January 07, 2019 at 1:34 pm

          I haven't tried it myself. What kind of tart tin is it? It will probably help if it's loose bottomed and I would try and line it with greaseproof paper if you can!

          Reply
  28. Madeline Kingsford says

    January 22, 2019 at 6:58 pm

    Wow just made this and it was scrummy. I used salted caramel favouring and fudge pieces as I can't eat chocolate. Thank you for the recipe

    Reply
    • Emma Walton says

      January 22, 2019 at 8:14 pm

      You've made my day! Glad you liked it 😀

      Reply
  29. Sharondeep Gill says

    April 10, 2020 at 12:14 pm

    Hi, I’ve made this numerous of times and everyone loves it. I was just wondering if I put 40grams of less sugar in would it make much difference apart from being less sugary. Thanks!

    Reply
    • Emma Walton says

      April 10, 2020 at 3:52 pm

      Hi Sharon, I can't say I've tried it with that particular ratio of sugar. It doesn't seem like a huge reduction so it shouldn't have that big an impact on consistency. If you do try it let me know how you get on.

      All the best

      Emma

      Reply
  30. Ann Barker says

    April 12, 2023 at 8:48 am

    Love this recipe. I’ve made it lots of times for various Birthdays. I’ve got a special multi Birthday celebration coming up so am going to try and make a Gluten free version as well as the normal recipe. Thankyou so much for sharing this recipe it definitely is amazing, even when it’s a bit drier( obviously using wrong size eggs after reading earlier comments) everyone loves it.

    Reply
    • Emma says

      April 14, 2023 at 4:15 am

      I'm so glad to hear that Ann. I hope it continues to be a recipe you love.

      Reply
  31. Joyce Rhodes says

    September 26, 2024 at 8:42 pm

    Great result, thankyou for this fab recipe, really pleased

    Reply
    • Emma says

      October 03, 2024 at 11:05 am

      So pleased you enjoyed it.

      Reply
4.91 from 21 votes (17 ratings without comment)

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Hi, I'm Emma. I'm a UK based food blogger who's been sharing recipes with the world since 2011. I'm passionate about eating a plant based diet using local, seasonal ingredients.

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