Description
This famous dessert is a traditional sheet cake known across home kitchens for its moist crumb and glossy topping. Unlike standard cocoa cakes that rely solely on water or dairy for liquid structure, this dessert uses classic fizzy soda combined with melted butter, unsweetened cocoa powder, and vegetable oil. The natural carbonation and real sugars inside the carbonated beverage work together to tenderize the wheat gluten, resulting in a light yet dense texture that never tastes dry.
Ingredients
For the Cake
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 1 teaspoon baking soda
- ½ teaspoon salt
- ½ cup unsalted butter
- ½ cup vegetable oil
- 1 cup Coca-Cola
- 3 tablespoons unsweetened cocoa powder
- ½ cup buttermilk
- 2 large eggs
- 1 teaspoon vanilla extract
For the Fudge Frosting
- ½ cup unsalted butter
- 3 tablespoons unsweetened cocoa powder
- 6 tablespoons Coca-Cola
- 4 cups powdered sugar
- 1 teaspoon vanilla extract
- ½ cup chopped pecans or walnuts, optional
Instructions
Preheat the oven to 350°F (175°C). Grease and lightly flour a 9 × 13-inch (23 × 33 cm) baking pan.
In a large bowl, whisk together the flour, sugar, baking soda, and salt.
In a saucepan over medium heat, combine the butter, oil, Coca-Cola, and cocoa powder. Heat until the butter melts and the mixture is smooth, stirring occasionally. Bring it just to a gentle simmer, then remove from the heat.
Slowly pour the warm chocolate mixture into the dry ingredients, whisking until combined.
Add the buttermilk, eggs, and vanilla. Mix until smooth, but don’t overmix.
Pour the batter into the prepared pan and bake for 30–35 minutes, or until a toothpick inserted in the center comes out with only a few moist crumbs.
While the cake is baking, melt the butter in a saucepan over medium heat. Stir in the cocoa powder and Coca-Cola. Bring the mixture to a gentle simmer and remove from the heat.
Gradually whisk in the powdered sugar and vanilla until smooth and glossy. Stir in the nuts if using.
Pour the warm frosting over the warm cake, spreading it quickly with a spatula before it begins to set.
Allow the cake to cool for at least 30 minutes before slicing. The frosting will firm up into a soft fudge-like layer as it cools.
Notes
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 545 kcal
Keywords: coke chocolate sheet cake, chocolate cola cake with fudge glaze, southern coca-cola cake