Peanut Butter Brownies
["1/2 c. peanut butter", "1/2 c. margarine", "1 1/2 c. sugar", "2 eggs", "1 tsp. vanilla extract", "1 c. flour"]
["Melt peanut butter and margarine over hot water.", "Add all other ingredients and mix well.", "Bake 20 to 30 minutes at 350\u00b0."]
["peanut butter", "margarine", "sugar", "eggs", "vanilla extract", "flour"]