Chocolate Brickle Sheet Cake
["1/4 c. cocoa", "2 sticks margarine", "1 c. water", "2 c. sugar", "2 c. flour", "2 beaten eggs", "1 tsp. vanilla", "1/2 c. buttermilk", "3 (1 oz.) pkg. Bits 'O Brickle"]
["Boil, stirring constantly, the cocoa, margarine and water. Blend remaining ingredients.", "Bake 20 minutes in a 400\u00b0 oven. Remove from heat.", "Frost immediately."]
["cocoa", "margarine", "water", "sugar", "flour", "eggs", "vanilla", "buttermilk"]