A rich, ultra-moist chocolate sheet cake topped with warm fudgy cocoa frosting. Easy, crowd-pleasing, and perfect for birthdays, potlucks, and casual celebrations.
Cake:
2 cups all-purpose flour
2 cups granulated sugar
½ cup unsweetened cocoa powder
1 tsp baking soda
½ tsp salt
1 cup unsalted butter
1 cup hot water or coffee
½ cup buttermilk
2 large eggs
2 tsp vanilla extract
Frosting:
½ cup butter
¼ cup cocoa powder
¼ cup milk
2 cups powdered sugar
1 tsp vanilla extract
Optional: ½ cup chopped pecans
Preheat oven to 350°F. Grease a 9×13″ baking dish or sheet pan.
Whisk together flour, sugar, cocoa, baking soda, and salt.
In a saucepan, melt butter with water or coffee and buttermilk. Remove from heat and whisk in eggs and vanilla.
Combine wet and dry mixtures. Stir until smooth.
Pour into pan. Bake 30–35 minutes (or 18–22 minutes for sheet pan), until a toothpick comes out with moist crumbs.
While cake bakes, make frosting: melt butter, whisk in cocoa and milk, then powdered sugar and vanilla.
Pour warm frosting over warm cake. Let cool before slicing.
For thinner cake, use a half sheet pan.
Add espresso powder to enhance flavor.
Serve with ice cream or berries.