Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting – One Pan Party Dessert
Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting

This easy chocolate sheet cake is the ultimate crowd-pleasing dessert that’s perfect for any occasion. With its moist, tender crumb and rich fudgy frosting, this one-pan chocolate dessert comes together in minutes and feeds a crowd effortlessly. Whether you need a quick party cake for gatherings, a simple weeknight dessert for the family, or a reliable potluck contribution, this classic chocolate sheet cake delivers every time.
The beauty of this recipe lies in its simplicity – you mix everything in one bowl, bake in a single pan, and top with the easiest fudgy frosting that sets up perfectly. No complicated techniques or hard-to-find ingredients required!

Ingredients
For the Cake:
- 2 cups all-purpose flour
- 2 cups granulated sugar
- 3/4 cup unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- 1 teaspoon salt
- 2 large eggs
- 1 cup milk
- 1 cup vegetable oil
- 1 teaspoon vanilla extract
- 1 cup boiling water
For the Fudgy Frosting:
- 1/2 cup butter
- 1/4 cup milk
- 1/4 cup unsweetened cocoa powder
- 3 cups powdered sugar
- 1 teaspoon vanilla extract
- Pinch of salt
Step-by-Step Instructions
Step 1: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan, or line it with parchment paper for easy removal.
Step 2: In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until well combined.
Step 3: Add the eggs, milk, vegetable oil, and vanilla extract to the dry ingredients. Mix on medium speed until just combined – be careful not to overmix.
Step 4: Slowly pour in the boiling water while mixing on low speed. The batter will be thin – this is normal and creates the moist texture we’re looking for.
Step 5: Pour the batter into your prepared pan and bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
Step 6: While the cake is baking, prepare the fudgy frosting. In a saucepan over medium heat, melt the butter. Whisk in the milk and cocoa powder until smooth.
Step 7: Remove from heat and stir in the powdered sugar, vanilla extract, and salt. Beat until smooth and glossy.
Step 8: Pour the warm frosting over the warm cake as soon as it comes out of the oven. Spread evenly with an offset spatula.
Step 9: Allow the cake to cool completely before slicing and serving. The frosting will set up into a delicious fudge-like topping.
Expert Tips for the Perfect Sheet Cake
Measure accurately: For the best results, spoon your flour into the measuring cup and level it off – don’t scoop directly from the bag.
Don’t overmix: Once you add the wet ingredients, mix just until combined. Overmixing can lead to a tough cake.
Use quality cocoa: Since cocoa powder is the star flavor, using a good quality brand makes a noticeable difference in taste.
Frost while warm: The warm frosting soaks into the warm cake slightly, creating an incredible texture combination.
Storage: Store covered at room temperature for up to 3 days, or refrigerate for longer freshness.
If you love easy baking projects like this chocolate sheet cake, you’ll adore our Ultimate Strawberry Crunch Cake for another crowd-pleasing dessert option.
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 it covered at room temperature.
Can I freeze this sheet cake?
Yes! Freeze individual slices wrapped tightly in plastic wrap for up to 3 months. Thaw at room temperature before serving.
What can I use instead of vegetable oil?
You can substitute an equal amount of melted butter or coconut oil if preferred.
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 clean.
Can I add nuts or chocolate chips?
Definitely! Fold in 1 cup of chopped walnuts or chocolate chips into the batter before baking for extra texture.
This easy chocolate sheet cake pairs beautifully with other family-friendly desserts like our Lemon Blueberry Yogurt Loaf for a dessert spread that everyone will love. For more quick and easy baking inspiration, check out our collection of family-friendly recipes.
Whether you’re hosting a party, bringing dessert to a potluck, or simply treating your family to a special weeknight dessert, this chocolate sheet cake with fudgy frosting is guaranteed to be a hit. The combination of moist cake and rich frosting creates the perfect balance that satisfies every chocolate craving!

Easy Chocolate Sheet Cake with Fudgy Chocolate Frosting
Ingredients
Method
- Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan, or line it with parchment paper for easy removal.
- In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until well combined.
- Add the eggs, milk, vegetable oil, and vanilla extract to the dry ingredients. Mix on medium speed until just combined – be careful not to overmix.
- Slowly pour in the boiling water while mixing on low speed. The batter will be thin – this is normal and creates the moist texture we’re looking for.
- Pour the batter into your prepared pan and bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
- While the cake is baking, prepare the fudgy frosting. In a saucepan over medium heat, melt the butter. Whisk in the milk and cocoa powder until smooth.
- Remove from heat and stir in the powdered sugar, vanilla extract, and salt. Beat until smooth and glossy.
- Pour the warm frosting over the warm cake as soon as it comes out of the oven. Spread evenly with an offset spatula.
- Allow the cake to cool completely before slicing and serving. The frosting will set up into a delicious fudge-like topping.





