Peanut Butter Fudge Cake
["1 c. margarine", "1/4 c. cocoa", "1 c. water", "1/2 c. buttermilk", "2 eggs, beaten", "2 c. sugar", "2 c. flour", "1 tsp. baking soda", "1 tsp. vanilla"]
["In a saucepan combine first 5 ingredients.", "Stir constantly over a low heat until mixture bubbles.", "Stir in sugar, flour and baking soda while mixture is hot.", "Beat until smooth, then stir in vanilla.", "Spread into a greased and floured 9 x 13-inch pan.", "Bake for 25 minutes at 350\u00b0 until center is firm to the touch.", "Cool."]
["margarine", "cocoa", "water", "buttermilk", "eggs", "sugar", "flour", "baking soda", "vanilla"]