1Heat oven to 350°F. Line 11x7-inch pan with foil, leaving 1 inch of foil overhanging at 2 opposite sides of pan; spray foil with cooking spray.
2In large bowl, place cookie mix. Cut in butter, using pastry blender (or pulling 2 table knives through mixture in opposite directions), until mixture looks like coarse crumbs. Stir in egg until mixture is moistened.
3Reserve 1 1/2 cups cookie mixture. Use slightly damp fingers to press remaining cookie mixture in bottom of baking pan (mixture will be sticky). Bake 20 minutes. Sprinkle pears over partially baked crust. Top with chocolate chips and reserved cookie mixture.
4Bake 20 to 25 minutes or until golden brown. Cool completely in pan on cooling rack, about 2 hours. Use foil to lift from pan. Cut into 4 rows by 4 rows.