In bowl of a food processor, place peppermint candies; cover and process until very finely crushed. In large bowl mix cookie mix, flour, melted butter and egg with spoon until soft dough forms. Stir in 1/4 cup crushed candies. Press firmly to shape dough into 56 (1 inch) balls.
Place 1 inch apart on ungreased cookie sheet.
Bake 5 to 7 minutes or until set but not brown. Cool 2 minutes on cookie sheet. Remove to cooling rack. In small bowl place powdered sugar. In another small bowl, place remaining crushed candies. Roll each warm cookie in powdered sugar, then crushed candies. Place on cooling rack. Cool completely; at least 20 minutes. Store in airtight container at room temperature.