Name: Classic Coca Cola Cake
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: Southern American
Ingredients: 2 cups granulated sugar; 2 cups all-purpose flour; 1/2 teaspoon salt; 1 cup Coca-Cola (not diet); 1 cup unsalted butter (2 sticks); 1/4 cup unsweetened cocoa powder; 2 large eggs; 1/2 cup buttermilk; 1 teaspoon baking soda; 1 teaspoon vanilla extract; Optional: 1 cup mini marshmallows; For the chocolate frosting:; 1/2 cup unsalted butter (1 stick); 1/4 cup Coca-Cola; 1/4 cup unsweetened cocoa powder; 3 1/2 to 4 cups powdered sugar, sifted; 1 teaspoon vanilla extract

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This Classic Coca Cola Cake is a rich, moist Southern chocolate dessert that I love making when I want something deeply comforting and nostalgic. The combination of cocoa and Coca-Cola creates a soft crumb with a deep chocolate flavor, and the warm frosting poured over the cake melts right in, making every slice incredibly tender and indulgent.

Why You’ll Love This Recipe

I love this recipe because it’s simple, reliable, and full of old-fashioned charm. The boil-and-pour method saves time and effort, and I don’t need a mixer to bring everything together. The Coca-Cola adds moisture and a subtle caramel note that enhances the chocolate without overpowering it. This cake always turns out rich, glossy, and satisfying.

Ingredients

(Tip: You’ll find the full list of Ingredients and measurements in the recipe card below.)

For the cake
2 cups granulated sugar
2 cups all-purpose flour
1/2 teaspoon salt
1 cup Coca-Cola (not diet)
1 cup unsalted butter (2 sticks)
1/4 cup unsweetened cocoa powder
2 large eggs
1/2 cup buttermilk
1 teaspoon baking soda
1 teaspoon vanilla extract
optional 1 cup mini marshmallows

For the chocolate frosting
1/2 cup unsalted butter (1 stick)
1/4 cup Coca-Cola
1/4 cup unsweetened cocoa powder
3 1/2 to 4 cups powdered sugar, sifted
1 teaspoon vanilla extract

Directions

I begin by preheating the oven to 350°F (175°C) and greasing a 9×13-inch baking dish. In a large bowl, I whisk together the flour, sugar, and salt and set it aside.

In a medium saucepan over medium heat, I combine the butter, cocoa powder, and Coca-Cola. I stir constantly and bring the mixture to a gentle boil until everything is fully melted and smooth. I immediately pour the hot mixture over the dry ingredients and stir gently until no dry spots remain.

Next, I stir in the eggs, buttermilk, baking soda, and vanilla extract until the batter is smooth. If I decide to use marshmallows, I fold them in at this stage. I pour the batter into the prepared pan, spread it evenly, and bake for 30 to 35 minutes until the center is set.

While the cake bakes, I prepare the frosting by melting the butter in a saucepan with the cocoa powder and Coca-Cola. Once it reaches a gentle boil, I remove it from the heat and gradually whisk in the powdered sugar until smooth and pourable. I finish by stirring in the vanilla.

As soon as the cake comes out of the oven, I pour the warm frosting evenly over the hot cake and spread it to the edges. I let the cake cool slightly before slicing.

Servings And Timing

I usually slice this cake into 15 servings.
Prep time: 15 minutes
Bake time: 35 minutes
Total time: 50 minutes

Variations

I sometimes add 1/2 teaspoon of cinnamon to the batter for a subtle warm note. When I want extra texture, I sprinkle chopped pecans over the cake before pouring on the frosting. If I’m craving a richer bite, I include the mini marshmallows for soft, melted pockets throughout the cake.

Storage/Reheating

I store this cake tightly covered at room temperature for up to 3 days. If I refrigerate it, it keeps well for up to 6 days, though I always bring it back to room temperature before serving. I also freeze individual slices wrapped well, then reheat them gently in the microwave for a quick dessert.

FAQs

Can I use a different pan size?

I stick with a 9×13-inch pan for best results, but a similar-sized baking dish works as long as the batter depth stays even.

Why does the frosting need to be poured on hot?

I pour it on while the cake is hot so it slightly sinks into the surface, which keeps the cake moist and creates that classic finish.

How do I avoid a dry cake?

I make sure not to overbake and always spoon and level the flour instead of packing it into the cup.

Are the marshmallows necessary?

I treat them as optional. The cake is delicious without them, but they do add extra softness and richness.

Can I make this cake ahead of time?

Yes, I often make it a day ahead because the flavor improves as the cake rests.

Conclusion

This Classic Coca Cola Cake is one of my favorite chocolate desserts because it’s easy, nostalgic, and consistently delicious. I love how the frosting becomes part of the cake and how moist it stays for days. It’s a timeless recipe that always feels special, no matter the occasion.