Objective: How to bake your jello cake?

Which of the following solutions is more sound in terms of naive physics reasoning?

Available options:
-Preheat oven to 375 F. Divide batter into 6 portions.Add each portion a different jello-o mix. Then add few drops of respective food color to each portion of cake batter. Mix well until to get uniform color. Grease a pan. Bake for about 12 - 15 minutes or until you can stick a toothpick in cleanly.;
-Preheat oven to 375 F. Divide batter into 6 portions.Add each portion a different jello-o mix. Then add few drops of respective food color to each portion of cake batter. Mix well until to get uneven color. Grease a pan. Bake for about 12 - 15 minutes or until you can stick a toothpick in cleanly.;
Preheat oven to 375 F. Divide batter into 6 portions.Add each portion a different jello-o mix. Then add few drops of respective food color to each portion of cake batter. Mix well until to get uniform color. Grease a pan. Bake for about 12 - 15 minutes or until you can stick a toothpick in cleanly.