The ingredients for a Reese peanut butter cake include Reese's peanut butter chips, shortening, and white or yellow cake mix, along with the ingredients required to prepare the cake mix.
To make this cake, preheat the oven to 350 degrees. Prepare two 8 or 9-inch baking pans by greasing them with 1 tablespoon of shortening and lining them with wax paper. Place 1 2/3 cups of peanut butter chips in a microwave-safe bowl and microwave on medium for about 1 minute, or until the chips have melted and are smooth. Prepare the cake mix according to the package directions, stir in the melted peanut butter chips, and pour the batter into the prepared pans. Bake the cake for about 35 minutes or until a toothpick inserted into the center comes out clean.
This cake can be topped with a peanut butter whipped cream frosting that is made using 1 2/3 cups of Reese's peanut butter chips, 2/3 cup of milk, 3 cups of miniature marshmallows, 2 cups of cold whipping cream, and 1 teaspoon of vanilla extract.
Make the frosting by adding the peanut butter chips, milk and marshmallows to a saucepan over low heat, stirring constantly until smooth. Allow the mixture to cool. In a separate bowl, beat the whipping cream with an electric mixer until it is stiff and fold in the vanilla and peanut butter mixture.
The frosted cake should be refrigerated until serving time and can be topped with chocolate syrup and chocolate shavings.