Puppy Chow

1/2 c Peanut butter

1/2 c Butter or margarine

6 oz Chocolate chips

10 c Corn Chex cereal

2 c Powdered sugar

Melt peanut butter, butter or margarine, and chocolate chips in a saucepan over medium heat. Pour over Corn Chex, being sure that all cereal is coated. Put 2 cups powdered sugar in a large paper bag. Put cereal in bag and shake gently until all cereal is coated. Pour out on wax paper to cool.