Microwave Fudge
["2 sticks margarine", "1 c. peanut butter", "1 lb. powdered sugar", "1 tsp. vanilla", "3 Tbsp. cocoa (optional)"]
["Microwave margarine on High 1 minute.", "Add remaining ingredients to margarine and mix.", "Microwave on High for 1 minute. Beat.", "Pour in buttered pan (9 x 13-inch) and cool."]
["margarine", "peanut butter", "powdered sugar", "vanilla", "cocoa"]