Peanut Butter Chocolate Marble Cake (Doctored Cake Mix)

Jump To Recipe Jump To Video

Everybody loves peanut butter and chocolate together, and this peanut butter chocolate marble cake with peanut butter whipped cream frosting is no exception!  

Peanut Butter Chocolate Marble Cake- Doctored Cake Mix

This easy doctored cake mix recipe tastes amazing with the perfect balance of peanut butter and chocolate flavor! It is ultra moist, delicious, and couldn't be easier to make.

If you are a fan of this winning flavor combination, this might just become your new favorite recipe. We hope that you enjoy it!

FAQs

Yes, these cake layers can be baked in advance and frozen for up to three months. To do this, bake the layers, allow to cool (we usually wrap them while still a bit warm).

Wrap each layer on its own foil-wrapped cardboard cake circle. Wrap tightly with a layer of two of plastic wrap followed by aluminum foil. (If you are only freezing for a few days, the foil is optional.)

When ready to thaw the layers, keep the layers wrapped and allow them to warm on the kitchen counter. We usually remove the wrapping after about 30-45 minutes. (You may have some condensation on the wrapping.)

Thaw to desired amount before assembling the cake. Some cake decorators prefer to work with partially frozen cake layers as they are less fragile and easier to handle.

Yes, because of the peanut butter whipped cream filling and frosting, this cake needs to be refrigerated.

However, for best taste and texture, remove the cake from the refrigerator about two hours before serving. This will give the cake time to warm and soften.

Yes, be careful not to "over marble" your cake. As fun as running the knife through the chocolate and yellow cake batter can be, be careful not to go overboard! ;0)

You'll lose your pretty marbled effect if you blend the chocolate and yellow cake batter too much.

We have a few more marble cakes to share with you! In addition to our scratch marble cake, we also have a delicious marble cake mix recipe, and a marble pound cake!

Peanut Butter Chocolate Marble Cake

How to Make Peanut Butter Chocolate Marble Cake

*You can find the full, printable cake recipe at the bottom of this post- but here is a quick rundown of our process.

Preheat the oven to 325 F, and prepare three 8 inch cake pans (we grease, flour, and add a parchment circle to the pans). 

In the bowl of your mixer, combine dry ingredients and mix for 30 seconds to combine.

In another bowl, combine water, eggs, oil & vanilla. Add the peanut butter and wet ingredients to the bowl of dry ingredients and mix on medium speed for 2 minutes. Use a spatula to scrape the bottom and sides of the bowl after one minute.

Peanut Butter Chocolate Marble Cake- Doctored Cake Mix

In a separate small bowl, combine 4 tablespoons of cocoa with 4 tablespoons of hot water and stir to dissolve. Allow the cocoa mixture to sit for a few minutes. 

Peanut Butter Chocolate Marble Cake

Then, combine the cocoa mixture with two cups of peanut butter cake batter to create the "chocolate" batter and set aside.

Peanut Butter Chocolate Marble Cake-A Doctored Cake Mix Recipe

Fill the prepared pans with peanut butter and chocolate batter.  I started by pouring about half of the peanut butter batter into the three pans, followed by about half of the chocolate batter, and then repeated.

There is less chocolate batter than there is peanut butter batter, and so you can see that I sort of poured the chocolate batter here and there. I followed with another round of layered peanut butter and chocolate batter.

Peanut Butter Chocolate Marble Cake

Now for the marbling! Run a knife through the batter to marble. Tap the sides and bottom of the pan to help the batter to spread out evenly within the pan. This part is fun! Just be careful not to over-marble ;0)

Peanut Butter Chocolate Marble Cake

 Tap the pan on the countertop a few times to make sure the batter is nice and even after swirling.

Peanut Butter Chocolate Marble Cake

Bake at 325 degrees....check at 23 minutes to see if middle of cake springs back when touched, a toothpick inserted in the center of the cake come out clean or with just a few crumbs attached.

Peanut Butter Chocolate Marble Cake

I love the look of marbled layers! If you are looking for a plain version of doctored Marble Cake, don't miss this recipe: Marble Cake Mix Recipe

How to Make Peanut Butter Whipped Cream

There are several fillings and frostings that would be perfect for this cake, including our peanut butter buttercream, peanut butter cream cheese frosting, and chocolate buttercream- but today, we've made a luscious and light peanut butter whipped cream that goes perfectly with our Peanut Butter and Chocolate swirled cake layers!

To make peanut butter whipped cream, all you need is heavy cream, creamy peanut butter, and powdered sugar. 

I mixed a bit of the cream with the peanut butter first to make it more thin, and then added in the remaining cream and powdered sugar and whipped it until stiff peaks formed.

This peanut butter whipped cream is so easy and delicious you'll want to put it on all of your peanut butter or chocolate desserts!

Peanut Butter Whipped Cream
Peanut Butter Whipped Cream

Assembling the Peanut Butter Chocolate Marble Layer Cake

To assemble this three layer cake, place the first marbled cake layer on the pedestal. Spread with a layer of peanut butter whipped cream.

I don't carry the filling all the way to the edge as it can bulge from the sides once the layers are stacked. I like to spread the filling to about ¼-1/2 inch from the edge of the layer.

Peanut Butter Chocolate Marble Layer Cake

Add the next layer and repeat. Top with the final cake layer. At this point I like to fill in any gaps between the cake layers- you can do this with a spatula but I prefer to fill in any gaps using a disposable piping bag with the tip snipped away.

Crumb coat the cake (thin frosting layer) to catch the crumbs and then frost the final layer of peanut butter whipped cream.

It is more difficult to get a smooth finish to your frosted cakes when working with whipped cream. So, to keep things simple, I opted for a pretty textured effect using a small offset spatula.

Peanut Butter Chocolate Marble Cake with Peanut Butter Whipped Cream

I topped the cake with miniature Reese's Peanut Butter Cups, and sliced some of them to vary the sizes.

I pushed them into the top of the frosting. I often use peanut butter cups as a decoration whenever working with peanut butter and chocolate cakes. They just make everything better, don't they?

Peanut Butter Chocolate Marble Cake
Peanut Butter Chocolate Marble Cake

More Peanut Butter Cakes and Frostings

If you love peanut butter desserts, don't miss these other delicious recipes!

Enjoy the Recipe

We hope that you enjoy this recipe! Make sure to check out our other cake mix recipes as well as our cake recipes from scratch!

Also, if you are interested in learning how to decorate your cakes, we have hundreds of free creative cake decorating tutorials!

Peanut Butter Chocolate Marble Cake with Peanut Butter Whipped Cream Frosting (Doctored Cake Mix)

Peanut Butter Chocolate Marble Cake

This moist Peanut Butter Chocolate Marble Cake is SO delicious! We've frosted it with a luscious Peanut Butter Whipped Cream. This recipe all starts with a simple cake mix!

Ingredients

For the Peanut Butter Chocolate Marble Cake

  • 1 box Yellow Cake Mix (We used Duncan Hines, Classic Yellow)
  • 1 cup granulated sugar (200g)
  • 1 cup All Purpose Flour (121g)
  • 1 cup Creamy Peanut Butter- We used Jif brand, full-fat (255g)
  • 1 ½ cups water (360g)
  • 2 teaspoons vanilla (8g)
  • 1 Tablespoon canola oil (8g)
  • 3 whole eggs
  • 4 Tablespoons unsweetened cocoa powder (measure then sift) + 4 Tablespoons very hot water (for marbling)

Peanut Butter Whipped Cream

  • 3 cups (726g) heavy cream or whipping cream
  • ½ cup (132g) creamy peanut butter - we used Jif but any creamy peanut butter will be
  • fine. We have not tested with natural peanut butter or reduced fat.
  • ⅓ cup (40g) powdered sugar - measure then sift if needed, if you want it sweeter you
  • could add a bit more powdered sugar
  • *We used sliced and whole miniature Reese's Cups to decorate the top of the cake.

Instructions

For the Peanut Butter Chocolate Marble Cake

  1. Preheat the oven to 325 degrees.
  2. Grease and flour three 8x2 round cake pans. (I also line my pans with parchment or wax paper.)
  3. In the bowl of your mixer, combine dry ingredients and mix for 30 seconds to blend.
  4. In another bowl, combine water, eggs, oil & vanilla. Add the peanut butter and wet ingredients to the dry and mix on medium speed for 2 minutes. Stop after 1 minute to scrape the sides and bottom of bowl then continue to mix for the second minute.
  5. In a small bowl, dissolve the 4 tablespoons of cocoa powder with 4 tablespoons of very hot water and allow to sit for 3 minutes. Then, combine this cocoa mixture with 2 cups of peanut butter batter to create the chocolate batter for marbling.
  6. To marble, I divided about half of the peanut butter batter between the three cake pans. Then, I divided half of the chocolate batter between the three cake pans on top of the peanut butter batter (scoop/drizzle approximately ⅓ cup chocolate batter into each pan). Repeat with the second half of the peanut butter batter and the remaining chocolate batter. Run knife through the pans a few times to marble the batter. Tap pans on countertop if needed so that the batter will spread out evenly.
  7. Bake at 325 degrees....check at 23 minutes to see if middle of cake springs back when touched, a toothpick inserted in the center of the cake come out clean or with just a few crumbs attached, and the cake will be slightly pulled away from the pan.
  8. Makes about 6 cups of batter.

For the Peanut Butter Whipped Cream

  1. Fifteen minutes or more in advance of making, chill your mixing bowl and whisk attachment or beaters in the freezer.  
  2. Add the peanut butter to the mixing bowl and approximately a cup of heavy cream.  Mix until the peanut butter is blended into the cream.  
  3. Add the powdered sugar and the remaining cream.  Mix at medium to medium high speed.
  4. As the mixture begins to thicken, stop the mixer and scrape the bottom and sides of the bowl.
  5. Continue to mix until the mixture thickens, and stiff peaks form.  Don't over mix.

Makes 5 cups of peanut butter whipped cream

Assembling the Peanut Butter Chocolate Marble Cake

  1. Place the first cake layer on the pedestal or cake base.
  2. Frost with a layer of Peanut Butter Whipped Cream Frosting.
  3. Repeat for the other two layers.
  4. Frost the top and sides with the Peanut Butter Whipped Cream. Smooth around the sides with a bench scraper or spatula to even out the amount of frosting all the way around. I then added texture with a small offset rounded spatula. When decorating cakes using a soft whipped cream frosting like this one, it is easier to use texturing techniques as we did rather than to go for a completely smooth finish.
  5. We topped of the cake with whole and sliced miniature Reese's Peanut Butter Cups!
  6. Because of the whipped cream frosting, this cake should be refrigerated until an hour or two before serving.

Leave a Reply

Your email address will not be published. Required fields are marked *

The maximum upload file size: 2 MB. You can upload: image. Drop file here

10 Comments

  1. I'm confused. Step 6 gives instructions on getting the batter into the 3 pans, but step 7 starts out by saying "pour into prepared cake pans..." I can't wait to make this cake, although I'll go with a chocolate frosting like a whipped ganache since my husband doesn't care for whipped cream type frostings. Maybe sprinkle some chopped peanut butter cups between the layers to make up for the omission of peanut butter frosting.

  2. Hi Diane! Yes, thanks for pointing that out, I've deleted the sentence that doesn't belong ;0) - Glad that you will be making this recipe! This will be great with chocolate buttercream- we have a good peanut butter buttercream also in our recipes section.

  3. This is a very good cake but I found the whipped cream frosting unable to support three layers. I may try it again and make a two-layer or rectangular one-layer cake.

  4. Hi Eunice, I'm glad that you enjoyed the cake- I'm sorry that you had trouble with the peanut butter whipped cream. It definitely is a softer frosting and so if you'd like something that will firm up when chilled (especially if transporting), you may prefer to use our peanut butter buttercream or chocolate buttercream from the Recipes section. Thanks for your feedback!

  5. Hello Melissa - I would love to try this but without eggs. What would your recommend as a substitute ?

  6. I made this delicious cake in a 9x13 pan for a birthday party using chocolate buttercream to support the weight of the decorations. I made a Bigfoot cake that was topped with handmade trees to create a little forest surrounding the cake topper. It was a HUGE hit. I will definitely make again using the peanut butter frosting, but man is it good with the chocolate!