Best Reese's Peanut Butter Cake EVER! What sets this recipe apart from all the rest? 1. A tender sour cream chocolate cake. 2. A fluffy, not too sweet peanut butter cream cheese icing. 3. The 4 layers of cake are alternately filled with chocolate frosting and peanut butter icing to balance the classic flavor combo. 4. Reese's candy in every bite 5. Chocolate frosting does double duty -- 1 cup is reserved for the end, is mixed with warm cream and used as a glaze.