Ingredients
2 cups all-purpose flour2 cups sugar1 teaspoon baking soda1/2 teaspoon salt1 cup water1/2 cup butter, cubed1/2 cup creamy peanut butter1/4 cup baking cocoa3 large eggs, room temperature1/2 cup sour cream2 teaspoons vanilla extractFROSTING:3 cups confectioners’ sugar1/2 cup creamy peanut butter1/2 cup 2% milk1/2 teaspoon vanilla extract1/2 cup chopped salted or unsalted peanuts
Preparation
Preheat oven to 350°. Grease a 13x9-in. baking pan.
In a large bowl, whisk flour, sugar, baking soda and salt. In a small saucepan, combine water, butter, peanut butter and cocoa; bring just to a boil, stirring occasionally. Add to flour mixture, stirring just until moistened.
In a small bowl, whisk eggs, sour cream and vanilla until blended; add to flour mixture, whisking constantly. Transfer to prepared pan. Bake until a toothpick inserted in center comes out clean, 25-30 minutes.
Meanwhile, prepare frosting. In a large bowl, beat confectioners’ sugar, peanut butter, milk and vanilla until smooth.
Remove cake from oven; place pan on a wire rack. Immediately spread cake with frosting; sprinkle with peanuts. Cool completely.
