1Heat oven to 350°. Place paper baking cup in each of 18 regular-size muffin cups. Make batter as directed on brownie mix box. Fill each cup 2/3 full (about 3 tablespoons each).
2Bake 22 to 26 minutes or until toothpick inserted near edge comes out almost clean. Do not overbake. Cool 5 minutes; remove from pan. Cool completely. Frost and decorate as desired. Store covered.