This peanut butter chocolate cake is a sophisticated dessert that combines the flavors of chocolate and peanut butter. The cake is made with cocoa powder, buttermilk, and peanut butter, which gives it a rich chocolate flavor and a moist texture. The frosting is a peanut butter Swiss meringue buttercream frosting made with egg whites, sugar, butter, peanut butter, and vanilla extract. It is light and fluffy, and it complements the chocolate cake perfectly. This cake is perfect for any special occasion, and it is sure to impress your guests.