Ingredients Cake: 3/4 cup butter, softened 1 1/2 cups sugar 4 egg whites 3/4 cup buttermilk 1/4 cup sour cream 2 teaspoons vanilla extract 3 cups flour 2 teaspoons baking powder 1 teaspoon baking soda 1/4 teaspoon salt 1/2 cup pink jimmies Strawberry Buttercream: 1/2 cup butter, softened 8 oz cream cheese, softened 3 tablespoons strawberry puree 1 tablespoon strawberry gelatin 1 teaspoon vanilla extract 4-5 cups powdered sugar Directions 1. Preheat oven to 350 degrees and line pans with cupcake liners. 2. Beat butter and sugar for 3 minutes, scrape bowl as needed. 3. Add egg whites one at a time on low until fully incorporated. 4. In a separate bowl, sift flour, baking powder, baking soda and salt together. 5. Alternate adding buttermilk and the dry ingredients to the butter/sugar mixture. 6. Mix in sour cream. 7. Fold in jimmies and fill liners 3/4 full. 8. Bake for 16-22 minutes, or until and inserted knife comes out clean. 9. Buttercream: Beat butter and cream cheese. Add strawberry puree, gelatin and vanilla extract. Slowly add powdered sugar until you reach your desired consistency. 10. Pipe in buttercream!