This post contains affiliate links.
Our easy Chocolate Peanut Butter Cake is a dream come true for peanut butter cup lovers. It's a moist, rich chocolate cake stacked with fluffy peanut butter frosting and smothered in silky chocolate.
Chocolate Peanut Butter Cake–need I say more?
Chocolate Peanut Butter Cake–need I say more?This is the best Chocolate Peanut Butter Cake recipe! It takes everything I love about peanut butter cups and turns it into a show-stopping dessert. The rich, moist chocolate cake layers paired with the fluffy peanut butter frosting are totally irresistible, and the smooth chocolate frosting on top pulls it all together like a bakery-style treat. It’s the kind of cake that always gets rave reviews and recipe requests. It's perfect for birthdays, holidays, or any time you want to impress!
Check out all of my cake recipes, like German Chocolate Cake, Better than Sex Cake, Biscoff Cake, or Flourless Chocolate Cake!
How to make Chocolate Peanut Butter Cake:
Make Cake Batter: Whisk together the dry ingredients (flour, sugar, cocoa powder, baking powder, baking soda, and salt). Add eggs, milk, oil, and vanilla; beat for 2 minutes. Stir in boiling water or hot coffee until the thin batter is smooth. Pour into greased and parchment-lined round cake pans.
Bake at 350°F for 30–35 minutes, or until a toothpick comes out clean. Cool for 10 minutes in pans, then transfer to wire racks to cool completely. Slice each cake layer in half horizontally to make four thin layers.
Assemble and Decorate: Spread ⅓ of the peanut butter frosting on top of the first cake layer then repeat with the remaining 3 cake layers. For the chocolate frosting, combine melted butter and cocoa powder then add powdered sugar, milk, and vanilla. Beat with electric mixers until smooth. Thicken or thin frosting as needed then spread chocolate frosting evenly over the outside of the cake. Optionally, pipe swirls on top of the chocolate and peanut butter cake and garnish with mini Reese’s peanut butter cups, if desired.
Chocolate Peanut Butter Cake
Ingredients
Chocolate Cake:
- 2 cups granulated sugar
- 1 3/4 cups + 2 Tablespoons all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 1 1/2 teaspoons baking powder
- 1 1/2 teaspoons baking soda
- 1 teaspoon salt
- 2 large eggs
- 1 cup buttermilk
- 1/2 cup oil, (vegetable, canola or avocado oil)
- 2 teaspoons vanilla extract
- 1 cup boiling water, , or hot coffee
Peanut butter frosting
- 1 batch Peanut Butter Frosting
Chocolate Frosting:
- 1/2 cup butter, (1 stick), melted
- 2/3 cup unsweetened cocoa powder
- 3 cups powdered sugar
- 1/3 cup milk
- 1 teaspoon vanilla extract
- 12 mini Reese's Peanut Butter Cups, for topping on cake, optional
Instructions
- Preheat oven to 350°F. Grease two 8-inch round baking pans and line the bottoms with parchment paper.
- Dry Ingredients: Stir together sugar, flour, cocoa, baking powder, baking soda and salt in large bowl.2 cups granulated sugar, 1 ¾ cups + 2 Tablespoons all-purpose flour, ¾ cup unsweetened cocoa powder, 1 ½ teaspoons baking powder, 1 ½ teaspoons baking soda, 1 teaspoon salt
- Add eggs, milk, oil and vanilla and beat on medium speed for about 2 minutes. Stir in the boiling water (your batter will be very thin–that's OK!). Pour batter into prepared cake pans.2 large eggs, 1 cup buttermilk, ½ cup oil, 2 teaspoons vanilla extract, 1 cup boiling water
- Bake for about 30 to 35 minutes or until a toothpick inserted in the center comes out clean. Allow to cool in the pan for 10 minutes; remove from pans to wire racks. Cool completely.
- Torte: Once cakes have cooled, use a sharp serrated knife to cut each cake horizontally in half, so that you end up with four, thin cake rounds.
- Assemble: Place one cake layer on serving plate. Smooth ⅓ of the peanut butter frosting on top of that cake layer. Repeat with the remaining cake layers, adding a layer of peanut butter frosting between each layer of cake.1 batch Peanut Butter Frosting
- Chocolate Frosting: Add melted butter to a large mixing bowl. Stir in cocoa powder. Add powdered sugar, milk and vanilla and beat with electric mixers until smooth. Add additional powdered sugar to thicken frosting or milk to thin it, as needed.½ cup butter, 2/3 cup unsweetened cocoa powder, 3 cups powdered sugar, ⅓ cup milk, 1 teaspoon vanilla extract
- Use an offset spatula or butter knife to spread the frosting evenly over the outside of the cake. I piped swirls of extra chocolate and peanut butter frosting on top and topped with a mini Reese's peanut butter cup. Cover and refrigerate until ready to serve.12 mini Reese's Peanut Butter Cups
Notes
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Text me new recipe ideas!
Simple, tasty ideas sent once a week. No spam.
Follow Me
I originally shared this recipe March 2016. Updated September 2021 and October 2025.
Hi! Can this cake recipe be used for cupcakes instead?
Sure! It will make about 2 dozen cupcakes.
I’ve never had a cake fail. His was a spectacular fail. The center did something, a total different texture , one batter decided to go up over one side. I live in Maine, so I’m maybe 75 feet above sea level. This was for a dinner party tonight. Guess I better find another dessert ASAP.
This recipe sounds perfect for my son’s birthday, thank you so much! One thing, when you say ‘melted butter’… do you mean stay out on the counter all day or place in microwave melted?
Melted in the microwave 🙂
Can you verify the mesurement for the amount of flour in the recipe is it 1 and 3/4 cup for the chocolate cake portion . Sorry want to make sure it comes out perfect ! Thanks
Hi Julia,
Yes it is 1 and 3/4 cups flour. I hope it turns out great!
Made this for my son’s birthday and everyone loved it! So easy to make. The peanut butter filling was not overpowering, the cake was moist and chocolatey, the frosting light and the perfect compliment to the cake and peanut butter filling. This will be my go-to chocolate cake. Thank you!
Don’t bake this cake in Colorado. It’ll explode all over your oven from the altitude. Screwed…..
I’m a huge fan of chocolate and peanut butter and I made this cake for a friend’s birthday. This might be the most delicious cake I’ve ever tasted! thank you for the recipe 🙂
Wonderful! Thanks so much for sharing. I hope you get to try my other cake recipes soon!
This recipe is amazing!! The peanut butter frosting is to die for. Thank you!
Thanks Renee! I agree, the peanut butter frosting is delicious!
can I use dairy free milk for the Cake and frostings?
Hi haven’t experimented with it, but I think it would work fine!
I just made this for my 22 year old son’s birthday . I was a little sceptical because the chocolate cake was so simplistic. I cut back the sugar a little. The peanut butter filling was rich and delicious as was the chocolate frosting . Once the cake was cut into it was much more appealing visually. Next time I would save some of the peanut butter filling to pipe rosettes on the top and alternate with the reeses cups . Very rich and delicious . The cake layers came out quite thin.