Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting – One Pan Dessert Recipe
Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting
Looking for the ultimate crowd-pleasing dessert that’s both easy to make and deeply satisfying? This chocolate sheet cake delivers rich cocoa flavor in every moist, tender bite, topped with an irresistible fudgy chocolate frosting that melts in your mouth. Perfect for busy weeknights, potlucks, or any celebration that calls for something sweet, this one-pan dessert comes together quickly without sacrificing that homemade taste everyone loves.
Ingredients
For the Sheet Cake:
- 2 cups all-purpose flour
- 2 cups granulated sugar
- ¾ cup unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- 1 teaspoon salt
- 1 cup buttermilk
- ½ cup vegetable oil
- 2 large eggs
- 2 teaspoons vanilla extract
- 1 cup boiling water
For the Fudgy Chocolate Frosting:
- ½ cup unsalted butter
- ¼ cup unsweetened cocoa powder
- ⅓ cup milk
- 3 cups powdered sugar
- 1 teaspoon vanilla extract
- Pinch of salt
Step-by-Step Instructions
This recipe follows the classic sheet cake method that ensures tender results every time. For more chocolate dessert inspiration, check out our one bowl chocolate cake recipe that shares similar baking techniques.
Step 1: Prepare the Cake Batter
Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan. In a large mixing bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt until well combined.
Step 2: Combine Wet Ingredients
In a separate bowl, whisk together buttermilk, vegetable oil, eggs, and vanilla extract. Pour the wet ingredients into the dry ingredients and mix until just combined. Avoid overmixing to keep the cake tender.
Step 3: Add Boiling Water
Slowly stir in the boiling water. The batter will be thin – this is normal and helps create the cake’s moist texture. Pour the batter into your prepared baking pan.
Step 4: Bake the Cake
Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean. Let the cake cool completely in the pan before frosting.
Step 5: Make the Frosting
While the cake cools, prepare the fudgy frosting. Melt butter in a saucepan over medium heat. Whisk in cocoa powder and milk until smooth. Remove from heat and stir in powdered sugar, vanilla, and salt until the frosting is glossy and spreadable.
Step 6: Frost and Serve
Spread the warm frosting evenly over the cooled cake. The frosting will set slightly as it cools. Cut into squares and serve.
Expert Tips for Perfect Results
For the best chocolate sheet cake experience, follow these professional tips:
- Don’t skip the boiling water: It helps bloom the cocoa powder for deeper flavor
- Measure flour correctly: Spoon flour into measuring cups and level with a knife for accuracy
- Cool completely: Warm cake will melt the frosting – patience pays off!
- Storage: Keep covered at room temperature for up to 3 days
If you love easy crowd-pleasing desserts, you might also enjoy our strawberry crunch cake for another simple yet impressive option.
Short FAQ
Can I make this cake ahead of time?
Yes! Bake the cake up to a day in advance and store covered at room temperature. Frost just before serving.
Can I use Dutch-process cocoa?
Regular unsweetened cocoa works best with the baking soda in this recipe. For more cocoa expertise, see our dark chocolate sheet cake guide.
What’s the best way to serve sheet cake?
Cut into squares directly from the pan – it’s perfect for parties and makes serving a breeze. For more party dessert ideas, check out our ultimate chocolate sheet cake collection.
Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting
Ingredients
Method
- Preheat oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan. In a large mixing bowl, whisk together flour, sugar, cocoa powder, baking soda, baking powder, and salt until well combined.
- In a separate bowl, whisk together buttermilk, vegetable oil, eggs, and vanilla extract. Pour the wet ingredients into the dry ingredients and mix until just combined.
- Slowly stir in the boiling water. The batter will be thin – this is normal. Pour the batter into your prepared baking pan.
- Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean. Let the cake cool completely in the pan before frosting.
- While the cake cools, melt butter in a saucepan over medium heat. Whisk in cocoa powder and milk until smooth. Remove from heat and stir in powdered sugar, vanilla, and salt until glossy and spreadable.
- Spread the warm frosting evenly over the cooled cake. Cut into squares and serve.
