Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting: The Ultimate One-Pan Dessert
Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting: The Ultimate One-Pan Dessert
When you need a dessert that’s sure to please a crowd but won’t keep you in the kitchen all day, this easy chocolate sheet cake is your perfect solution. With its moist crumb and decadent fudgy frosting, this classic tray bake delivers maximum chocolate flavor with minimal effort. Perfect for potlucks, parties, or simple weeknight treats, this recipe transforms basic pantry ingredients into a dessert everyone will love.
Ingredients
For the Cake:
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 1 teaspoon baking soda
- 1 teaspoon salt
- 1 cup unsalted butter
- 1 cup water
- 1/4 cup unsweetened cocoa powder
- 2 large eggs
- 1/2 cup buttermilk
- 1 teaspoon vanilla extract
For the Fudgy Frosting:
- 1/2 cup unsalted butter
- 1/4 cup unsweetened cocoa powder
- 1/3 cup milk
- 4 cups powdered sugar
- 1 teaspoon vanilla extract
- 1/2 cup chopped pecans or walnuts (optional)
Step-by-Step Instructions
Step 1: Prepare the Cake Batter
Preheat your oven to 350°F (175°C). Grease and flour a 15×10-inch jelly roll pan or a 9×13-inch baking pan. In a large mixing bowl, whisk together flour, sugar, baking soda, and salt.
Step 2: Create the Chocolate Mixture
In a medium saucepan, combine butter, water, and cocoa powder. Bring to a boil, stirring constantly. Once boiling, remove from heat and let it cool slightly before adding to the dry ingredients.
Step 3: Combine Wet Ingredients
In a separate bowl, whisk together eggs, buttermilk, and vanilla extract. Pour the hot chocolate mixture into the dry ingredients and mix well. Then add the egg mixture and stir until smooth.
Step 4: Bake the Cake
Pour the batter into your prepared pan and spread evenly. Bake for 18-22 minutes (for jelly roll pan) or 25-30 minutes (for 9×13 pan) until a toothpick inserted in the center comes out clean.
Step 5: Make the Frosting
While the cake bakes, prepare the frosting. In a saucepan, combine butter, cocoa powder, and milk. Bring to a boil, then remove from heat. Whisk in powdered sugar and vanilla until smooth. Stir in nuts if using.
Step 6: Frost the Cake
Pour the warm frosting over the hot cake immediately after it comes out of the oven. Spread evenly with a spatula. Let the cake cool completely before cutting into squares.
Expert Tips for Perfect Results
Room Temperature Ingredients: For best results, ensure your eggs and buttermilk are at room temperature. This helps create a smooth, evenly textured batter.
Don’t Overmix: Once you combine wet and dry ingredients, mix just until combined. Overmixing can lead to a tough cake.
Timing is Key: Pour the warm frosting over the warm cake so it soaks in slightly, creating a moist, fudgy layer.
Pan Size Matters: A larger jelly roll pan makes thinner slices perfect for parties, while a 9×13 pan creates thicker, more traditional cake slices.
Frequently Asked Questions
Can I make this cake ahead of time?
Absolutely! This cake actually tastes better the next day as the flavors meld together. Store covered at room temperature for up to 3 days.
Can I freeze chocolate sheet cake?
Yes, freeze unfrosted cake layers wrapped tightly for up to 3 months. Thaw and frost before serving.
What can I use instead of buttermilk?
Make your own by mixing 1/2 cup milk with 1 1/2 teaspoons lemon juice or vinegar. Let it sit for 5 minutes before using.
How do I know when the cake is done?
The cake should spring back when lightly touched, and a toothpick inserted in the center should come out with moist crumbs, not wet batter.
Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting
Ingredients
Method
- Preheat your oven to 350°F (175°C). Grease and flour a 15×10-inch jelly roll pan or a 9×13-inch baking pan. In a large mixing bowl, whisk together flour, sugar, baking soda, and salt.
- In a medium saucepan, combine butter, water, and cocoa powder. Bring to a boil, stirring constantly. Once boiling, remove from heat and let it cool slightly before adding to the dry ingredients.
- In a separate bowl, whisk together eggs, buttermilk, and vanilla extract. Pour the hot chocolate mixture into the dry ingredients and mix well. Then add the egg mixture and stir until smooth.
- Pour the batter into your prepared pan and spread evenly. Bake for 18-22 minutes (for jelly roll pan) or 25-30 minutes (for 9×13 pan) until a toothpick inserted in the center comes out clean.
- While the cake bakes, prepare the frosting. In a saucepan, combine butter, cocoa powder, and milk. Bring to a boil, then remove from heat. Whisk in powdered sugar and vanilla until smooth. Stir in nuts if using.
- Pour the warm frosting over the hot cake immediately after it comes out of the oven. Spread evenly with a spatula. Let the cake cool completely before cutting into squares.
