01 -
Preheat oven to 350°F. Grease a 9x13-inch baking dish with butter or oil, then lightly dust with flour.
02 -
In a stand mixer bowl, combine the cake mix and Dr. Pepper Cherry. Mix on medium speed for 2 to 3 minutes until smooth.
03 -
Drain maraschino cherries, reserving the juice for frosting. Set aside 24 whole cherries for garnish; halve the remainder. Gently fold halved cherries into the cake batter.
04 -
Pour batter into the prepared baking dish. Bake for 30 to 35 minutes or until a tester inserted into the center comes out clean. Do not overbake.
05 -
Allow cake to cool in the pan on a rack until fully cooled before frosting. This prevents the frosting from melting.
06 -
In a clean mixer bowl, beat softened butter on medium-high for 3 to 4 minutes until fluffy. Gradually add 3 cups powdered sugar on low speed, then beat in 3 to 4 tablespoons reserved cherry juice. Add extra powdered sugar if needed to achieve thick, spreadable consistency.
07 -
Using an offset spatula, evenly spread cherry frosting over the cooled cake.
08 -
Sprinkle chocolate shavings over the frosting and place reserved whole cherries evenly across the surface.
09 -
Refrigerate cake for at least 1 hour to allow the frosting to set before slicing and serving.