Heat oven to 350°F. Grease and flour two 1 1/2-quart ovenproof mixing bowls, two 10-oz. custard cups, and one 12-cup miniature muffin pan. In very large bowl, prepare both cake mixes with water, oil and eggs as directed on package. Divide 1 3/4 cups batter evenly into custard cups. Fill each muffin cup 2/3 full. Divide remaining batter into greased and floured bowls. Place bowls in oven first, then custard cups and muffin pan.