Supreme Chocolate Cake

Ingredients

• 2 sticks margarine
• 1 cup water
• 4 tablespoons cocoa
• 1 cup sour cream
• 2 cups flour
• 1 2/3 cups sugar
• 1/2 teaspoon salt
• 1 teaspoon baking soda
• 1 teaspoon vanilla
• 2 eggs
• Icing: 1 cup confectioner's sugar
• 1/2 stick margarine
• 3 tablespoons milk
• 2 tablespoons cocoa