Chocolate Peanut Butter Layer cake with chocolate sour cream frosting and cookie dough filling

Chocolate peanut butter layer cake with Oreo edible cookie dough layers.

The Destroyer had his 17th birthday a few weeks back and he let me choose the birthday cake flavour. 

I asked Bubble what type of cake I should make and she said "I think he likes peanut butter and chocolate", and tbh I'm not sure if that is true or if I have just been making peanut, chocolate, Oreo flavoured cakes for him for so many years that we all think that it's true.

This beautiful cake is 4 cake layers with alternating dark black cocoa and peanut butter cake, layers of edible cookie dough with crushed Oreo, an Italian Meringue buttercream layer and crumb coast with homemade caramel and finished off in delectable chocolate sour cream frosting (which is my current obsession).

The cut slices are visually super attractive with the alternating layers of cake and filling.

Alternating cake layers are as visually attractive as they are delicious

In a controversial move for a tall cake I used Chocolate sour cream frosting which I am a bit obsessed with at the moment. Although it is insanely delicious it is quite soft and not ideal for fancy smooth cake finishes so I just swirled it about and added some strawberries, raspberries and just before serving added some Oreo's on top.

All the good things in one cake

There are a lot of components to this cake so I made the chocolate cake a few weeks earlier and froze it wrapped in cling wrap stored in an airtight container and then defrosted it the night before I assembled the cake. I made the Peanut Butter cake in the morning and whipped up the edible cookie dough frosting and Italian Meringue Buttercream whilst the cake was cooling. I made the sour cream frosting after the cake was stacked and covered the whole cake straight away and popped into the fridge.

Happy Baking 

XX

Linda M

Honestly how lovely do these cake slices look waiting to be served 💕

Peanut Butter Cake makes 1x 6" cake, recipe can be doubled

125g (4 3/8oz) plain (all purpose) flour
1 tsp baking powder

1/4 tsp salt

90g milk

28 g (1oz) butter
50b (1 3/4oz) smooth peanut butter
2 eggs (room temperature)

Grease and line 1 X 6" round baking tin oven to 160C (325F).

Combine the flour, baking powder and salt, I did not sift but if your flour needs a sift you should probably do that so your cake batter is not lumpy at the end.

Heat the milk and butter together until the butter is melted and whisk in the peanut butter. I popped my milk and butter into a microwave safe bowl and heat in microwave on high for 1 minute.

Pop the eggs into a large bowl and whisk until pale and creamy, approximately 3 minutes with an electric hand mixer. See the picture below for progression of consistency. After 1 minute the eggs will appear light, but you want to keep on going for the full 3 minutes. It is possible to mix with a hand whisk but it will take a little longer.

Add the remaining ingredients alternately starting and ending with the flour as follows:

1/3 of the flour, then mix;

1/2 of the wet peanut/butter, then mix;

another 1/3 of the flour, then mix;

remaining half peanut/butter, then mix;

remaining flour mix until combined and then keep mixing for another 30 seconds to 1 minute.

Pout into the prepared baking tin and bake for 50 minutes to 1 hour until golden brown and a skewer comes out of the cake clean. 

Remove from oven and turn out onto a wire rack to cool prior to cutting and decorating.

To Assemble

6" Peanut Butter Cake (recipe above)

6" Midnight Sky Black Cocoa Cake 1/2 recipe (CLICK HERE FOR RECIPE)

Edible chocolate chip cookie dough substitute Crushed Oreo for chocolate chips (CLICK HERE FOR RECIPE)

Chocolate Sour Cream Frosting (recipe below)

Italian Meringue Butter cream (CLICK HERE FOR RECIPE)

Strawberries, raspberries and Oreos for decorating (optional)

6" cake board

Slice the chocolate cake and peanut butter cake in half horizontally. You will end up with 4 cakes.

Take half the edible cookie dough and press it onto the top of one chocolate layer and do the same with the remaining half of the cookie dough and other chocolate cake. I find it easiest to press the cookie dough into a disk between the flat palms of my hand and pop it on top of the cake. 

Secure one layer of the chocolate cake to the cake board with a little dollop of buttercream. I like to use the flat bottom of the cake to get a secure flat first layer. 

Top with a layer of peanut butter cake, spread with a thin layer of  buttercream underneath to attach to the cookie dough layer. Then top with a layer of the Italian Meringue buttercream. I used about 2/3 of a cup. I added a layer of homemade caramel (Optional CLICK HERE for caramel recipe) pop the cake into the fridge to set before proceeding.

You will need to ensure each cake layer is even as you build up.

Top with a third layer of cake using the second cookie dough topped chocolate cake and pop into fridge again to set.

Top with final layer of peanut butter cake once again using a thin spread of buttercream on the bottom to attach it to the cookie dough filling. I normally like to make sure this cake is the other 'bottom' cake and turn it upside down so the bottom is the top of the cake for a perfect flat finish (but I did not do that here-not sure why).

Give the cake a thin layer of Italian meringue all over as a crumb coat.

Pop into fridge and chill. Once the cake is firm remove from fridge and cover with chocolate sour cream frosting. 

Cover the edges and top with all of the frosting. I simply used a palette knife to cover the cake but use whatever process you are used to. I swirled the frosting around to give an old fashioned retro look.

Chocolate sour cream frosted cake.
Also how amazing are the Australian Native flowers from my garden in the white jug !

Top with strawberries and raspberries if desired and store in fridge. If you want to add Oreo's do so just before serving.

Sour cream Chocolate Frosting Recipe - this frosting is super delicious and is perfect for brownies. This recipe is enough to frost this tall 4 layer 6" cake on the outside, or frost a dozen cupcakes or a batch of brownies.

115g (3 7/8oz) unsalted butter at room temperature
130g (45/8oz) icing sugar
40g (1 3/8oz) cocoa
1 tsp vanilla
1/4 tsp salt
120g (3 7/8oz) sour cream 

Mix together butter and icing sugar until combined. 

Add cocoa and vanilla and combine well. 

Add in half sour cream and salt and mix until just combined, add remaining sour cream and mix until just combined and creamy, do not overmix.

Perfect Birthday cake for boys 17th birthday party or really just any reason

💕

Original photos and recipe from the Bubble and Sweet blog ©Linda McCubbin 2025. I love when people share my blog ideas and give credit. Please feel free to link back to my blog for non commercial purposes or contact me. Affiliate links and adds may earn me money, however all ideas and opinions are my own.

Linda Mccubbin is a blogger, baker, maker and author of the cookbook ' Sweets on a Stick': More than 150 kid friendly recipes for cakes, candies, cookies and pies on the go!. Published in the US in 2011 (under my previous name Linda Vandermeer).