2 c. (12 oz. pkg.) Hershey's semi-sweet chocolate chips
1 (14 oz.) can sweetened condensed milk
1 tsp. vanilla extract
1 c. peanut butter chips

Line 8-inch square pan with foil. In saucepan over low heat, melt chocolate chips with sweetened condensed milk and vanilla; blend well. Remove from heat. Add peanut butter chips, stir just to mix throughout. Spread evenly into prepared pan. Refrigerate 2 hours or until firm. Remove from pan; peel off foil. Cut into squares. Store tightly covered in refrigerator. Makes 3 dozen pieces or about 2 pounds.