Chocolate Sheet Cake

A quick and easy dessert with a frosting that turns to fudge. Terrific for a summer picnic.


1 cup (2 sticks) butter or margarine
1/4 cup unsweetened cocoa powder
1 cup water
2 cups all-purpose white flour
2 cups white sugar
1/2 teaspoon salt
1 teaspoon baking soda
2 eggs
1/2 cup sour cream, buttermilk, or yogurt
1/2 cup (1 stick) butter or margarine
1/2 cup unsweetened cocoa powder
5 to 6 tablespoons milk
1 box (1 pound) confectioners' sugar (4-1/2 cups)
1 teaspoon vanilla extract


Preheat the oven to 350 degrees F. Grease an 11-inch by 17-inch baking pan.

In a large saucepan, combine the 1 cup butter, ¼ cup cocoa, and water. Bring to a boil, then cool to room temperature. Add the remaining cake ingredients and beat until smooth. Pour into the prepared pan. Bake for about 22 minutes or until a tester inserted near the center comes out clean.

Meanwhile, make the frosting by combining all the ingredients in a saucepan. Bring to a boil. Pour the warm frosting on the warm cake. Let cool before serving.

Cooking & Recipes


about 40 servings


Ruth Southwick Willington Baptist Church, Willington, Connec


Add new comment

I halved this recipe, as I

I halved this recipe, as I didn't want such a large cake -- but I went ahead and used the entire amount of cocoa powder for the cake in the original recipe. I didn't make the frosting, however, but used a regular icing instead. It came out well and was sufficiently "chocolatey" to please everyone in my household, including my one housemate who's picky about chocolate things.