I know what you’re thinking. Another cookie cake? Yes, yes, it’s true! And this one is even better than a regular cookie cake because there is a surprise inside! Yes there are M&M’s galore but there is also a layer of Oreos running right through the middle.
This gorgeously golden cookie combines my three favourite things (Oreos, cookies and candy) into the most sumptuous treat – an Oreo Stuffed M&M Cookie Cake! It is the best of all three worlds, with a golden crust, a soft creamy cookie centre, a generous slathering of crunchy M&M’s AND a secret stash of Oreos!
I had way too much fun making my Nutella Stuffed Chocolate Chip Cookie Bars a few weeks ago. So I thought to myself, what else can you put inside a cookie? Thus the Oreo Stuffed M&M Cookie Cake was born. Have you ever put Oreos into baked goods before?
What I love most about this sweet treat, is it looks so tempting on the outside, but the fun only really begins when you cut that first slice and catch a glimpse of the wonderful Oreo surprise! Your family and friends are sure to be impressed. So grab the Oreos from the back of the cupboard and let’s get baking!
Also if you happen to be celebrating the Fourth of July this weekend, don’t forget about my special Fourth of July Peanut Butter Cookie Cake – complete with swirls of red and blue buttercream!
I don’t know if there’s any better way to celebrate than with a cookie cake! I think I’ll be celebrating with an authentic American burger in one hand and a peanut butter treat in the other!

Let's Bake
Oreo Stuffed M&M Cookie Cake
A giant Oreo Stuffed M&M Cookie Cake with a secret stash of Oreos!
Ingredients
- 115 grams (1/2 cup / 1 stick) unsalted butter, room temperature
- 140 grams (3/4 cup) brown sugar
- 1 teaspoon vanilla extract
- 1 large egg
- 175 grams (1 and 1/4 cup) plain flour
- 1/2 teaspoon baking soda
- 1 teaspoon cornflour or cornstarch
- 13 Oreo cookies
- 75 grams (1/2 cup) plain M&M’s, plus extra for decorating
Instructions
- Prepare your round 9 inch baking tin by greasing with butter and lining with baking or parchment paper. Preheat the oven to 180 (360 F). In a large mixing bowl, cream the butter and sugar for 3-4 minutes with an electric beater or until pale and creamy. Add the vanilla and the egg and beat again until combined. Sift in the flour, baking soda and cornflour and gently fold with a wooden spoon or spatula.
- The next part is a little bit of a labour of love – but it’ll be worth it. Divide the dough into two and press half of the cookie dough into the bottom of your pan. You will need to spread it out with your hands so there are no gaps – go right into the corners. Once this is done, place your Oreos on top of the cookie dough and press them down slightly so they stick. Just make sure you don’t put any Oreos right along the edge as you want room for the cookie dough to go down the sides so the Oreos are completed hidden.
- Add the M&M’s to the other half of the cookie dough and mix through. Then grab small pieces or blobs of the cookie dough and place them all over the Oreos. You will then need to spread the cookie dough out gently with your hands so the Oreos are fully covered. Pop into the oven for approximately 20-22 minutes or until golden brown on top. Press a few extra M&M’s gently into the top while it’s still warm. Then leave the cake to cool for 15 minutes or until you can safely remove it from the tin and then pop it onto a wire rack to cool completely.
Josh says
This is amazing!
★★★★★
Jessica Holmes says
Thanks Josh!
Lynn says
COOKIES IN A COOKIE. I dig it, Jess!
Jessica says
Love your cookie cake recipes! They always look so good! Loving the idea of stuffing the cake with Oreos. YUM.
Amy says
A cookie within a cookie. This is the cookie inception cake 🙂
I cannot wait to grab a packet of GF ‘oreos’ and bake this one up for my family! You have such a great knack for combining sweet treats into even yummier creations Jess!
Jessica Holmes says
Thank you Amy! You are too kind! 🙂
Beeta says
Oh my, I can see those Oreos winking at me between the cookie layers!!! Look at them…they’re saying come and eat me if you can! This is THE quintessential American cake…and it looks fantastic, Jess! Are you sure you’re not American?? 😉
Jessica Holmes says
LOL! You make me laugh Beeta! They are totally winking at me too. Hahaha I’m pretty sure but I do like to pretend! 😉
Leah says
JESSICA YOU ARE A COOKIE CAKE MIRACLE WORKER!!!!!!! Can’t WAIT to make this. Best surprise ever.
Jessica Holmes says
Aww thanks Leah! Your comment made me smile!!! 🙂
Sues says
Whoaaa. This is outrageous in the best possible way! Such a fun treat.
Jessica Holmes says
Thanks Sues, I find myself always craving the ‘outrageous’!
Kelly says
Oh my goodness, you always make the most mouthwatering treats! Love the stuffed oreos in here! So fun and delicious!
Jessica Holmes says
Thanks so much Kelly!
Ashley says
My goodness! I know someone who would love this cake. I don’t know what could be sweeter than a cookie cake stuffed with oreos!
Jessica Holmes says
Thanks Ashley! I know someone who ate way too much of this one! 😉
Samantha says
This looks amazing and I love the hidden oreos! Such a nice surprise! 🙂
Jessica Holmes says
Thanks Sam! Surprise cake (or cookie cakes) are so much fun!