01 -
Heat the oven to 350°F and grease a nine-by-thirteen-by-two-inch pan.
02 -
Reserve six tablespoons of cherry juice. Remove stems from twenty-four cherries and quarter them, draining away excess liquid.
03 -
Mix the specified dry cake mix with the measured soda until combined.
04 -
Fold in the quartered cherries. Spread the batter evenly in the prepared pan.
05 -
Bake about thirty minutes, continuing until a center tester has no wet batter.
06 -
Cool completely in the pan. Beat softened butter until creamy.
07 -
Add powdered sugar gradually on low speed, then the reserved juice.
08 -
Beat until evenly spreadable and frost the fully cooled cake. Drain the remaining cherries and use them as decoration, then refrigerate the finished cake.