Birthday Cake Whoopie Pies

These Birthday Cake Whoopie Pies are ready for celebrating! With colorful jimmies mixed right into the batter and sandwiched together with a sweet marshmallow crème filling, these whoopie pies are a great alternative to cupcakes and cookies. Made using the Whoopie Pie Pan, these cakes bake up quickly and are the perfect size for handmade treats. Making these for a holiday or monumental celebration? Switch the rainbow jimmies out for sprinkles that match your occasion! Try red and green for Christmas or pink and blue jimmies for a gender reveal party!

Prep25 min
Total Time45 min
Skill LevelBeginner

Ingredients & Tools
Instructions

Instructions

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Preheat oven 325°F. Prepare pan with vegetable pan spray.
In a large bowl, beat butter and sugar with an electric mixer on medium speed until light and fluffy, about 3 minutes. Add egg and vanilla; beat until well combined.
In another bowl, sift together the flour, baking powder and salt. Add half of the dry ingredients into the butter mixture and mix on low speed. When dry ingredients are almost incorporated, stop the mixer and add the milk. Continue to mix on low speed until milk is almost incorporated. Stop the mixer and add the remaining dry ingredients.
Mix on low until just combined. Fold in the rainbow jimmies. Spoon 2 tablespoons of batter into each cavity; spread batter to the edges. Cavities should be about 2/3 full. Sprinkle additional jimmies on top of cavities before baking.
Bake for 11-13 minutes or until the top of the cake springs back when lightly touched. Allow the cakes to cool in pan on a cooling grid for 8 minutes. Remove and cool completely before filling.
For filling, in a large mixing bowl, beat butter with an electric mixer on medium speed until creamy. Add powdered sugar and salt; mix well. Add marshmallow crème and vanilla; blend well. Add Wilton Icing Color, if desired. Pipe or spread filling onto Whoopie pies and decorate with sprinkles, if desired.