You could do this with regular white cake mix but we got Duff Goldman's tie-dye cake mix because that way we knew the food coloring colors would mix and be pretty, instead of turning muddy.
So did Ion. Super helpful. Those beaters weren't going to lick themselves.
(please ignore the just-played-outside shirt. His only involvement in food prep was licking the beaters. No sweat or mud got in the cake.)
Separate the batter into 6 bowls and let a child help you mix your colors. If said child sneaks bites, you will be able to tell by the blue stains on her lips.
Separating out the batter and mixing the colors was kind of more time consuming than I like food prep to be, like, ever. But the kids thought it was AWESOME and I got to sneak in a lesson about the color wheel. A delicious color wheel.
Some lessons die hard when you're the child of an art teacher.
By the way, using the food coloring that came in the box was the right choice. Look at how not-muddy those colors are!
Then you pour the batter into the pan in order (red first, then orange on top, then yellow on top of that, etc.).