Divide batter evenly among 3 medium bowls (about 1 1/2 cups in each). Stir orange food color into one bowl; stir yellow food color into second bowl. Leave remaining batter white. Place about 1 teaspoon of each color batter into each muffin cup, layering colors in order of candy corn—yellow, orange and white. Do not stir! Each muffin cup will be about three-fourths full.