Coke Cola Cake Recipe | Classic Chocolate Sheet Cake with Marshmallows
This classic Coke Cola Cake is a vintage community-cookbook favorite: a soft chocolate sheet cake with mini marshmallows and a warm cocoa-Coke frosting poured on while the cake is hot. It’s easy, nostalgic, and perfect for serving a crowd.
Follow the steps below for the cake and the quick pour-on frosting.
Coke Cola Cake
Ingredients
- 2 cups flour
- 2 cups sugar
- 1 cup butter or margarine
- 3 tablespoons cocoa
- 1 cup Coke
- 1/2 cup buttermilk
- 2 eggs, slightly beaten
- 1 teaspoon baking soda
- 1 teaspoon vanilla
- 1 1/2 cups miniature marshmallows
Frosting
- 1/2 cup butter or margarine
- 3 tablespoons cocoa
- 6 tablespoons Coke
- 1 box powdered sugar (10x sugar)
- 1 cup chopped nuts (optional)
Preheat oven to 350°F.
Instructions
- Grease a 9×13×2-inch pan.
- In a large bowl, combine flour and sugar; set aside.
- In a saucepan, bring butter, cocoa, and Coke to a boil. Pour over the flour mixture and stir.
- Mix in buttermilk, eggs, baking soda, vanilla, and miniature marshmallows until combined.
- Pour into pan and bake 30–35 minutes.
- Frosting: Bring butter, cocoa, and Coke to a boil. Immediately pour over powdered sugar and beat well. Stir in nuts (optional), then spread frosting on the warm cake while the frosting is still hot.
- Total cook time: 30–35 minutes baking
- Equipment: 9×13×2-inch pan
- Servings: 12
Coke Cola Cake FAQ
Why does this cake use Coke?
Coke adds moisture and helps deepen the cocoa flavor, giving the cake a classic sheet-cake texture.
Do I frost the cake while it’s warm?
Yes—this recipe is best when the frosting is poured and spread while both the frosting and cake are still warm.
Can I leave out the nuts?
Yes. The frosting works fine without nuts, or you can swap in chopped pecans or walnuts.
How should I store Coke Cola Cake?
Store covered at room temperature for 1–2 days, or refrigerate for longer freshness.