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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, featuring a moist, tender crumb and rich fudgy frosting. With its simple one-bowl mixing and single-pan baking, this classic recipe delivers delicious results with minimal effort.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 12 servings
Calories: 380
Ingredients Method Notes

Ingredients
  

Ingredients
  • 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
  • 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

Method
 

Instructions
  1. Preheat your oven to 350°F (175°C). Grease and flour a 9x13-inch baking pan, or line it with parchment paper for easy removal.
  2. In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt until well combined.
  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.
  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.
  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.
  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.
  7. Remove from heat and stir in the powdered sugar, vanilla extract, and salt. Beat until smooth and glossy.
  8. Pour the warm frosting over the warm cake as soon as it comes out of the oven. Spread evenly with an offset spatula.
  9. Allow the cake to cool completely before slicing and serving. The frosting will set up into a delicious fudge-like topping.

Notes

Measure flour accurately by spooning into cup and leveling off, don't overmix the batter, use quality cocoa powder for best flavor, frost the cake while warm for optimal texture, store covered at room temperature for up to 3 days