For the cake:
- 2 c. all-purpose flour
- 1 1/2 tsp. baking powder
- 1/2 tsp. salt
- 6 egg whites
- 3/4 c. milk
- 175 g. unsalted butter
- 1 1/2 c. sugar
- 1/2 tsp. vanilla extract
- 63 g. unsalted butter
- 1/2 c. creamy peanut butter
- 3/4 c. powdered sugar
- 1/2 tsp. vanilla extract
- Your favorite flavor of jelly
Preheat your oven to 315°F and grease the CakeWich™ pan. For the batter, use a whisk to mix the flour, baking power and salt. In a separate bowl, mix the egg whites and milk.
Blend the softened, unsalted butter and sugar in a mixer until the mixture is a light and fluffy consistency. Add the vanilla extract and beat vigorously. Add one quarter of your dry ingredients and one quarter of your wet ingredients to the mixture and blend at a low speed. Repeat steps until all of the ingredients are combined.
Pour the batter into the cake pan, smooth its top using a spatula and bake for about 60 to 70 minutes. If you stick a toothpick into its center, it should come out clean. Cool for one hour while the cake is still in the pan. Then release the cake right side up and continue cooling.
Using an electric mixture, mix the softened, unsalted butter and creamy peanut butter until it's thoroughly blended. Gradually add the powdered sugar and vanilla extract; beat for 3 minutes until fluffy.
Slice off the cake's dome and then slice the cake horizontally into two equal parts. Spread peanut butter frosting and jelly on one cake layer. Place the second cake layer on top to complete your cake. Stick colorful happy birthday candles into the cake. "Happy birthday to you…"