Heat oven to 350°F (325°F for dark or nonstick pans). Place paper baking cup in each of 24 regular-size muffin cups. In small bowl, toss chocolate chips with 1 tablespoon of the cake mix. In large bowl, beat remaining cake mix, the water, oil and eggs with electric mixer on low speed 30 seconds, then on medium speed 2 minutes, scraping bowl occasionally. Stir in coated chocolate chips. Divide batter evenly among muffin cups.