Perfect combination of peanut butter and chocolate in a moist and soft sheet cake. Topped with a rich peanut butter frosting. Super easy to make!
2 cups all-purpose flour
2 cups sugar
1 teaspoon baking soda
1/2 teaspoon salt
1 cup water
1/2 cup butter, cubed
1/2 cup creamy peanut butter
1/4 cup baking cocoa
3 large eggs, room temperature
Frosting Ingredients
3 cups powdered sugar
1/2 cup creamy peanut butter
1/2 cup milk
1/2 teaspoon vanilla extract
1/2 cup chopped salted or unsalted peanuts and chocolate chips
1. Preheat oven to 350 degrees. Spray a 13×9 baking pan with nonstick spray. Set aside.
2. In a large bowl, whisk flour, sugar, baking soda and salt. In a small saucepan, combine water, butter, peanut butter and cocoa. Cook until it just starts to boil, stirring occasionally. Pour into flour mixture, stirring just until combined.
3. In a small bowl, whisk eggs, sour cream and vanilla until blended. Add to flour mixture, whisking constantly. Transfer to prepared baking pan. Bake until a toothpick inserted in center comes out clean, 25-30 minutes.
4. FROSTING: In a large bowl, beat powdered sugar, peanut butter, milk and vanilla until smooth.
5. Remove cake from oven and place on a wire rack. Cool the cake for about 15-20 minutes and then frost the cake. Will make the frosting slightly melty and gooey. Sprinkle chopped peanuts and chocolate chips on top. Cool completely before cutting.