In medium bowl, mix cookie mix, butter, flour and egg until soft dough forms. On lightly floured surface, roll dough 1/4 inch thick. Using 3-inch heart-shaped cookie cutter, cut out 22 large heart shapes. Using 1 1/2-inch heart-shaped cookie cutter, cut center out of each large heart. Place the 22 small heart-shaped cookies on cookie sheet. Brush cookies lightly with water. Place 1 heart-shaped fruit snack cutout on each small cookie.