Heat oven to 375°F. Spray cookie sheet with cooking spray; dust with Bisquick mix. In medium bowl, mix Bisquick mix and 1/3 cup sugar. Cut in butter, using pastry blender (or pulling 2 table knives through ingredients in opposite directions), until crumbly. Stir in egg until soft dough forms. Pat dough into 12x10-inch rectangle on cookie sheet; pinch edges of rectangle to form 1/2-inch rim.