1 box white cake mix
8 oz cream soda
6 oz vanilla yogurt
Mix ingredients then bake as directed on cake mix box.
Separate your frosting: 2/3 in one bowl, 1/3 in another. Tint the 2/3 with 2 drops blue food coloring. Mix 11/2 Tbsp cornstarch into the 1/3 bowl. Frost cupcakes with blue frosting. Place cornstarch + frosting mixture into a small plastic bag and cut a small triangle from the corner of the bag (homemade pastry bag). Pipe "clouds" onto cupcakes. Cut rainbow candy ribbons in half (approx 3 inch pieces). Insert each end of the rainbow into a cloud.
These were great for the bake sale but would be terrific for a special birthday party too!