Peanut Butter Cookie Cake Recipe

If you love peanut butter, then this is the cake you need to try!

This peanut butter cookie cake has a lovely peanut butter flavor and is soft and chewy.

This dessert is loaded with peanut butter candies and topped with chocolate icing.

In essence, this peanut butter cookie cake is a thick, chewy gigantic peanut butter cookie.

It’s far simpler to create than a layer cake and is the ideal birthday dessert.

In this article, we will discuss how you can create this delicious peanut butter cookie cake.

Important Things To Keep In Mind

You’ll be extremely familiar with this recipe if you’ve ever baked peanut butter cookies.

For the most flavor in this recipe, real butter is used, along with a mixture of brown and white sugar.

Brown sugar gives cookies a chewier texture by increasing taste and moisture.

Next, there is one egg plus one additional yolk. The extra egg yolk gives the cookie cake a softer texture, which is essential for creating the ideal cookie and cake texture.

Additionally, it can be quite tempting to include extra Reese’s or chocolate chips.

If you add too many, though, you may find it difficult to cut the cookie cake into slices.

As a result, we don’t suggest using more than 1 cup of mix-ins overall.

Peanut Butter Cookie Cake Ingredients

  • 1 1/2 cups of all-purpose flour – There is no need to sift this flour.
  • 1 teaspoon each of baking soda and baking powder – This cake uses two leavening agents to help make this cake rise.
  • 1 egg and 1 egg yolk – Eggs are used to bind all the ingredients together.
  • 1/2 cup of white sugar – To add sweetness.
  • 1/2 cup of brown sugar – Helps to give the cake its brown color.
  • 1 teaspoon of vanilla extract – This gives the cake a sweet flavor.
  • 1/2 cup of salted or unsalted butter – Either type of butter is fine, but just adjust the amount of salt that you add to the recipe depending on the type of butter that you use.
  • 3/4 cup of peanut butter – It is your choice whether you use crunchy or creamy peanut butter. However, we do suggest you avoid natural peanut butter.
  • Frosting – Make it yourself or purchase store-bought, both taste great and give a mouth-watering finish.
  • 1 cup of add-Ins – It is up to you whether you add peanut butter chips, chopped peanuts, or chocolate chips.

Peanut Butter Cookie Cake Recipe

Step 1: Preheat your oven to 350 degrees Fahrenheit. Then spray the sides of a 9-inch spring form pan with non-stick cooking spray and line the bottom with parchment paper.

Alternately, lightly spritz nonstick cooking spray on a 9-inch pie plate.

Step 2: Beat the butter, brown sugar, and white sugar until smooth in a large bowl.

Gradually mix in the crunch or creamy peanut butter until the mixture is smooth.

Step 3: To this smooth mixture, add your egg and yolk, alongside the vanilla extract.

Mix until combined.

Step 4: Now it’s time to add your dry ingredients consisting of all-purpose flour, salt, baking soda, and baking powder to your wet mixture.

Once combined you can add in your add-ins whether that is chocolate chips, peanut butter cups, or nuts.

Step 5: Spread the cookie dough out evenly into your prepared pan.

Then you can bake the cake for 22 to 28 minutes. Or until the cake is golden brown.

Step 6: Once cooked, remove from the oven. Place the cake to cool on a wire rack. Now it’s time to get your frosting ready.

Frosting Your Peanut Butter Cookie Cake

It is up to you whether you frost your peanut butter cake or not. If you do decide to frost the cake, then you need to allow the cake to cool fully before doing anything.

Frosting is a great finishing element and makes this cake look really impressive, especially when presented on a cake stand.

Store-bought frosting is a great option if you are short on time. However, to make your own chocolate frosting, you will need the following:

  • 2 cups of powdered sugar.
  • 1/4 cup of cocoa powder.
  • 1 tablespoon of milk.
  • 1/2 cup of unsalted butter.

Frosting Instructions

Step 1: Using a stand mixer on a medium speed, beat your butter until it is creamy and smooth.

Step 2: Now you can slowly add in your powdered sugar and cocoa powder until all combined. If the mixture begins to look too dry, you can add a tablespoon of milk.

Step 3: Once the cake has fully cooled down, you can add your frosting. Either spoon it on your cake or pipe it around the edges. It is up to you how you decorate the cake.

Why not add some leftover candies or peanut butter cups on top as a final touch. Additionally, you could make a peanut butter frosting instead. To do this, use more peanut butter instead of cocoa.

Storing The Cake

It is best to eat the peanut butter cookie cake as soon as possible.

You can store the cake in an airtight container for around 4 days.

However, the cake will gradually become harder over those 4 days. The cake will be at its softest on day 1.


We have given you the steps and tricks to make this cake that all peanut butter lovers will enjoy.

Essentially, this is just a giant peanut butter cookie, but you can alter the recipe to suit your tastes.

This recipe is a perfect excuse to use up those leftover Reese’s peanut butter cups and chocolate chips you have lying around.

With such a rich peanut butter flavor, this cake is ideal for anyone who loves peanut butter!

Picture of Kathryn Sewell

Kathryn Sewell

Hi! I'm Kate and I have been baking and cooking for as long as I can remember. I like to share the most interesting tips and recipes I try here on What Kate Baked for you to enjoy. If you have a favorite recipe you'd like to share send it over on social.

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