Here's a great chocolate sheet cake!!!
Large Bowl: 2 cups flour, 2 cups sugar, ½ teaspoon salt
Stir together to mix.

Small Bowl: 1 cup sour cream, 2 eggs, 1 teaspoon baking soda
Stir together to mix.

Saucepan: 1 cup butter, 4 Tablespoons cocoa powder, 1 Cup water
Melt butter, add cocoa and water, bring to boil.

Combine butter/cocoa mixture with flour/sugar mixture.
Add sour cream/egg mixture.

Bake at 350 degrees, 25 minutes in an 11 x 9 pan.

Frost while warm with icing:

Icing: 1 stick butter, 6 tablespoons milk, 4 tablespoons cocoa powder
Melt in a saucepan and boil one minute.
Add 16 ounces (one box) powdered sugar and 1 teaspoon vanilla.
Pour over cake while warm and let cool.