Peanut Butter and Jelly Cake for a Halloweentime birthday for my granddaughter Leah. Peanut Butter Cake with Strawberry Jam filling and Peanut Butter Buttercream. Buttercream hay, pumpkins, & cats. Candy Clay horses (brown ones are peanut butter flavor). This cake originally had a barn, but as you can see, it didn't make it!