Step 2
In large bowl, beat cake mix, water, oil and eggs with electric mixer on medium speed 2 minutes, scraping bowl occasionally. In small bowl, place 1/2 cup of the batter; stir in 1/2 teaspoon of the food color. Divide remaining batter between pans. Drop tablespoonfuls of colored batter in random pattern over top of batter in each pan. Cut through batters with table knife in zigzag pattern for marbled design.