Muddy Buddies(A.K.A. "Puppy Chow")  
["9 c. Chex cereal", "1 c. semi-sweet chocolate chips", "1/2 c. peanut butter", "1/4 c. margarine or butter", "1 tsp. vanilla extract", "1 1/2 c. powdered sugar"]
["Pour cereal into large bowl.", "Set aside.", "In 1-quart microwave-safe bowl, combine chocolate chips, peanut butter and margarine.", "Microwave on High for 1 to 1 1/2 minutes or until smooth, stirring after 1 minute.", "Stir in vanilla.", "Pour mixture over cereal until pieces are evenly coated.", "Pour mixture into resealable bag with powdered sugar and shake until all pieces are covered.", "Spread on waxed paper to cool."]
["cereal", "semi-sweet chocolate chips", "peanut butter", "margarine", "vanilla extract", "powdered sugar"]