01 -
Preheat oven to 350°F. Lightly spray a 9x13-inch baking dish with nonstick baking spray.
02 -
Remove cherries from the jar, reserving the juice. Stem 15 cherries, slice each into quarters. Keep remaining cherries with stems for garnish.
03 -
In a large bowl, combine the dry cake mix and Cherry Dr Pepper using a mixer on low until just blended. Fold in the quartered cherries using a large spoon.
04 -
Pour batter into prepared dish and bake for 28 minutes or until a toothpick inserted in the center comes out clean. Let cool completely.
05 -
In a large bowl, beat softened butter with reserved cherry juice on medium speed. Gradually add powdered sugar on low speed, ½ cup at a time, until firm frosting consistency is achieved. Add up to ½ cup more powdered sugar if frosting is too thin.
06 -
Spread frosting evenly over cooled cake surface.
07 -
Score serving portions on frosting. Place one stemmed cherry on each piece. If stemmed cherries are insufficient, slice stemless cherries for decoration. Refrigerate for 30 to 60 minutes to set frosting.
08 -
Evenly sprinkle chocolate shavings over the frosting before serving.