01 -
Preheat oven to 350°F. Grease a 9x13-inch baking dish with butter or oil, then dust lightly with flour.
02 -
In a stand mixer bowl, combine chocolate cake mix with Dr. Pepper Cherry. Mix on medium speed for 2 to 3 minutes until smooth.
03 -
Drain maraschino cherries, reserving 24 whole for decorating. Halve the remaining cherries and gently fold them into the batter.
04 -
Pour batter into prepared pan. Bake for 30 to 35 minutes, or until a toothpick inserted in the center comes out clean. Do not overbake.
05 -
Allow the cake to cool completely in the pan before frosting to prevent melting.
06 -
In a clean mixer bowl, beat softened unsalted butter until light and fluffy, about 3 to 4 minutes.
07 -
Gradually add powdered sugar with the mixer on low speed. Increase speed and beat for 2 to 3 minutes.
08 -
Add 3 to 4 tablespoons of reserved cherry juice and beat until the frosting is smooth and holds its shape. Add extra powdered sugar if necessary for consistency.
09 -
Spread frosting evenly over cooled cake using an offset spatula.
10 -
Sprinkle chocolate shavings over the frosted cake and arrange reserved whole cherries evenly for garnish.
11 -
Refrigerate the cake for at least 1 hour to set the frosting before slicing.