I recently was asked to make Rainbow Cupcakes for someone, and I had never made them before. Well they ended up being super easy and came out really neat. Try them out for yourself, and play around with the colors to make them match whatever the theme/holiday is.
Divide colors into cupcake liners. I used a 1/2 ounce scoop but a teaspoon would work. No matter how many colors you use, do not fill the liners more than 2/3 full to prevent over flow when baking.
Bake according to package directions. Check for doneness by poking a toothpick into the cupcakes. If it comes out clean or with very minimal crumbs than they are done. Cool in the pan on a cooling rack for about 10 minutes and then remove from pan for further cooling. Do not frost your cupcakes until they are fully cooled.
I couldn't resist and had to break one open to see how the rainbow effect turned out. And they were so cool looking!
I ended up making 100 of these so divided them up and frosted them into all of the colors of the rainbow that I had used in the batter. I made regular American Buttercreme (Shortening, Powdered Sugar, Water, Meringue Powder, and Vanilla) You can of course use whatever suits your personal taste. The Wilton Buttercream Recipe is a good basic icing to make. Add a pinch of salt if you feel it is too sweet, but just a pinch.
Hope these brightened up your day and inspired you to try them out. Homemade is always better than store bought!