1Heat oven to 350°F. Spray bottom of 13x9-inch pan with cooking spray.
2In large bowl, stir cookie mix, oil, water and egg until soft dough forms. Press into pan. Bake 15 to 18 minutes or until edges are light golden brown. Cool 10 minutes.
3In small microwavable bowl, microwave chocolate chips and butterscotch chips on High 1 to 1 1/2 minutes or until melted. Spread evenly over base. Refrigerate 30 minutes or until set. For bars, cut into 9 rows by 4 rows.