Rum and Cola Birthday Cake

For the over-21 birthday party crowd, this Rum and Cola Birthday Cake is made with Betty Crocker SuperMoist devil's food cake mix and cola. The icing on the cake? Rum buttercream frosting!

  • Prep Time 20 min
  • Total Time 2 hr 0 min
  • Servings 12



box Betty Crocker™ SuperMoist™ devil's food or dark chocolate cake mix
cup vegetable oil
1 1/4
cups cola carbonated beverage

Rum Buttercream Frosting

cup butter, softened
3 1/2
cups powdered sugar
cup dark rum
tablespoons rum extract

  • 1 Heat oven to 350°F (325°F for dark or nonstick pans). Grease bottoms and sides of 2 (9-inch) round cake pans with shortening; lightly flour.
  • 2 Make cake mix as directed on box, using oil and eggs and substituting carbonated beverage for the water. Bake and cool as directed.
  • 3 In large bowl, beat butter with electric mixer on low speed 1 to 2 minutes or until creamy. Gradually add powdered sugar, 1 cup at a time, beating after each addition. Add rum and rum extract. Continue beating until frosting is smooth and spreadable.
  • 4 Place 1 cake layer, rounded side down, on serving plate. Spread with a layer of frosting. Top with second cake layer, rounded side down. Frost side and top of cake with remaining frosting. Decorate as desired.

Expert Tips

Add a dramatic-looking accent to this cake with Betty Crocker® black decorating icing. And don’t forget the candles!

This cake does not need to be refrigerated.