1Heat oven to 325°F. Place mini paper baking cup in each of 24 mini muffin cups.
2In medium bowl, stir together brownie mix, oil, water and egg until smooth. Fold in nuts. Divide batter evenly among muffin cups.
3Bake 18 to 22 minutes or until toothpick inserted in center comes out almost clean. Cool 5 to 10 minutes; remove from muffin pan cups.