I was in charge of birthday cake at work this month and since one of my birthday co-workers favorite things is peanut butter and chocolate, I decided to go ahead and make this peanut butter chocolate cake. I ended up making it in a 9 by 13 pan to guarantee some extra slices, but it would be best as a round cake with layers. This turned out pretty tasty, most of my co-workers favorite part was the peanut butter cream cheese frosting, which would be great on top of any boxed vanilla, yellow, or chocolate cake.
2 1/4 cups cake flour
2 1/2 tsp baking powder
1 tsp salt
1 1/4 cups sugar
About 1/2 cup unsalted butter, at room temperature
1/2 cup creamy peanut butter
2 large eggs
2 tsp vanilla extract
2/3 cup milk
Peanut butter filling:
3/4 cup creamy peanut butter
8 ounces cream cheese, at room temperature
1 cup powdered sugar
1/4 cup milk
1 canister of chocolate fudge frosting
2 Reese's Peanut Butter Cups, chopped into small pieces
1. Preheat oven to 350°. Butter and flour 2 round 9-in. cake pans.
2. Sift flour, baking powder, and salt into a medium bowl; set aside.
3. In the bowl of a stand mixer, beat sugar, 1/2 cup butter, and peanut butter until creamy. Crack eggs into a small dish (do not beat) and add vanilla. Add eggs to the butter mixture 1 at a time, scraping down the inside of the bowl as needed. Beat in flour mixture and milk in alternating batches, starting and ending with the flour and making sure each addition is fully incorporated before adding the next.
Recipe adapted from: http://www.myrecipes.com/recipe/chocolate-peanut-butter-cake-10000001891976/