Heath Toffee Bar Coffee Cake
["1/2 c. margarine", "2 c. flour", "1 c. brown sugar", "1/2 c. white sugar", "1 c. buttermilk", "1 tsp. soda", "1 egg", "1 tsp. vanilla", "1 c. chopped Heath toffee bars*", "1/4 c. chopped pecans", "2 eggs", "1 c. sugar", "2/3 c. self-rising flour", "1/2 c. melted margarine", "5 heaping tsp. cocoa", "1 tsp. vanilla", "1 c. chopped nuts (optional)"]
["Melt", "margarine in a brownie pan while oven preheats to 350\u00b0. Beat eggs.", "Add sugar, flour, cocoa, vanilla, margarine and nuts. Mix just until blended."]
["margarine", "flour", "brown sugar", "white sugar", "buttermilk", "soda", "egg", "vanilla", "toffee", "pecans", "eggs", "sugar", "flour", "margarine", "cocoa", "vanilla", "nuts"]