1. Prepare cake batter according to package directions. Transfer 1 cup to a small bowl; stir in the extract, food coloring and 1/2 cup crushed candies. 2. Spoon 2 cups of remaining batter into a greased and floured 10-in. fluted tube pan. Carefully top with peppermint batter; do not swirl. Top with remaining plain batter. 3. Bake at 350° for 35-45 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack to cool completely. 4. Combine confectioners' sugar and milk; drizzle over cake. Sprinkle with remaining crushed candies.