We’re SO happy to share this scratch Peanut Butter Cake recipe with you! We’ve had a Peanut Butter & Chocolate Cake on our site for years, but for the true Peanut Butter fans, we needed a layer cake with even more Peanut Buttery goodness!
The BEST Peanut Butter Cake
Peanut Butter Buttercream Trial and Error
How to Make a Peanut Butter Layer Cake
How to Apply a Ganache Drip:
Our ganache drip consists of a 1:1 ratio of chocolate to heavy cream. Once prepared according to our instructions below, we loaded the ganache into a disposable piping bag, snipped the tip away, and applied the ganache around the edge of our chilled peanut butter cake.
We then spread the remaining ganache over the top of the cake, connecting the border of drips that we just created. This seems like a backwards way of applying a drip, but actually piping the drip in this way gives us the most control.
If you’d rather, you could also just spread ganache over the top of a chilled cake and allow the ganache to spill over the edge in some places. It won’t be as symmetrical, but is still a great look!
Consistency of the Ganache drip
This 1:1 consistency chocolate to cream will give your ganache a fluid quality although it will still thicken as it sits out. It’s best to have the cake ready to go before making the drip.
If your ganache sets up too much, you can microwave it for just a few seconds at a time until ready. It should flow easily from your piping bag, but it should not be very warm when applying to the cake.
If you’d like to sneak even more chocolate into your cake, you can also use this ganache in the filling, along with the peanut butter buttercream!
*For a quick and helpful tutorial on creating and applying a Ganache Drip, don’t miss our free tutorial!: How to Make a Ganache Drip.
For the Peanut Butter Cake Layers
- 1 1/2 sticks (170g) unsalted butter, slightly softened
- 1 1/2 cups (300g) white sugar
- 1 cup packed (217g) light brown sugar
- 1 cup (255g) creamy peanut butter (Do not use all natural or reduced fat)
- 2 teaspoons (15g) vegetable oil
- 2 teaspoons (8g) vanilla extract
- 3 large eggs (if cold, the eggs can be placed in a bowl with very warm water for a few minutes)
- 3 cups (342g) cake flour **(if you do not have cake flour see substitution below)
- 3 teaspoons (12g) baking powder
- 1/2 teaspoon (3g) baking soda
- 1/2 teaspoon (3g) salt
- 1 cup (242g) sour cream
- 1 cup (242g) milk
- ** You can make your own cake flour: For each cup of flour in a recipe, remove 2 Tablespoons of all purpose flour (plain in the UK) and replace with 2 Tablespoons of cornstarch. For this recipe, measure out 3 cups all purpose flour, remove 6 Tablespoons flour and replace with 6 Tablespoons cornstarch. Whisk to blend.
For the Peanut Butter Buttercream
- 2 sticks (226g) unsalted butter, slightly softened
- 1 cup (255g) creamy peanut butter ( do not use natural or reduced fat or it will not have the right consistency for spreading)
- 4 cups (460g) powdered sugar
- 1/4 cup (60g) milk plus 2 Tablespoon - more if needed to reach the consistency you like
- 2 teaspoon (8g) vanilla extract
- 6 oz (171g) Chocolate (Semi-sweet or Dark) We used Ghirardelli
- 6 oz (171g) Heavy Cream
For the Peanut Butter Cake Layers
- Preheat the oven to 350 degrees. Grease and flour three 8 inch round cake pans. Place a circle of parchment paper or wax paper in the bottom of each pan.
- In a medium bowl add the cake flour, baking powder, baking soda and salt. Whisk at least 30 second to blend.
- In a medium bowl add the milk and sour cream, whisk to blend the sour cream into the milk. Set aside.
- In the bowl of your mixer, beat the butter on medium speed until softened and smooth. Slowly add the white and brown sugar and beat at medium speed for 3-5 minutes. It will lighten in color and be fluffy.
- Add the peanut butter, oil and vanilla extract and mix until blended into the butter sugar mixture.
- Add the eggs one at a time, mixing after each until the yellow of the yolk is blended in.
- Add the dry ingredients alternately with the wet ingredients, beginning and ending with the dry ingredients (3 additions of dry and 2 of wet). Mix at medium speed until just blended in. Do not over mix or mix above medium speed.
Bake at 350 degrees for 25 to 30 minutes. Be sure to check for doneness with a toothpick inserted in the center of the cake. It is done when the toothpick comes out clean or with just a few crumbs attached. Let cool in the pan 10 minutes then turn out. Makes 8 cups batter
Works well for cupcakes, the cupcakes will have a very slight dome
For The Peanut Butter Buttercream Frosting
- In the bowl of your mixer add the butter and mix on medium speed until the butter is softened and smooth. Add the peanut butter and mix until blended.
- Gradually add the powdered sugar alternately with the milk. Add vanilla. Mix on medium speed 4 to 5 minutes until smooth.
For the Ganache Drip
- Place your chocolate into a microwave safe bowl.
- Pour heavy cream over the chocolate and place in the microwave for 1 minute.
- Remove and let sit for 1 minute to soften. Stir, then microwave in 10 second intervals until the chips are nearly melted. Then allow to sit for 1 minute more, stir until it takes on a silky smooth consistency.
*Microwave times may vary. If you are making a smaller amount of ganache, you will reduce the microwave time. If your chocolate hasn't melted after time recommended in the instructions, simply microwave in small 5-10 second increments until it has nearly completely melted. Let sit one minute, then stir until smooth.