Rum and Cola Birthday Cake

Blogger Arlene Cummings of Cooking With Sugar makes a “cocktail cake” that combines cola and rum with chocolate—perfect for the more mature birthday guy or girl. Rum and Cola Birthday Cake makes any adult birthday celebration into an instant party.

  • 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.