Annie's 9th birthday party was "Tie Dye" themed, and she is a self-proclaimed artist, so a graffiti art cake seemed the perfect fit. We experimented the previous weekend with a traditional yellow cake recipe from my tried and true Better Homes and Gardens cookbook. We made the batter, separated it into four bowls and then colored each with food coloring. Then we carefully spooned the batter into a cake pan (we did not swirl or stir or blend or in any other way combine the colors! The baking merges them in cool ways, so there's no need). So, the inside of the cake was "tie-dye." All we had to do now was cover the outside with fondant and order food-safe markers (thank goodness for Amazon Prime!).
Here's the kiddos helping with the batter: