Once upon a time I used to bake cakes and cupcakes ALL the time. Once I discovered a certain cake at a local grocery store I no longer bake cakes and cupcakes. My husband and I used to host parties. I would go above and beyond for each party. I used a Wilton white cake recipes to make the batter.
Cake: I separated the batter into three separate bowls. I added Wilton food coloring to each bowl. I layered the batter into the cupcake liners.
Icing: I used a Wilton Buttercream frosting recipes. I divided the frosting into 1/3 and added Wilton food coloring. I placed each frosting in a separate frosting bag. I took a large zip-lock bag and added all three bags into the zip-lock bag. I put a large frosting tip inside the ziplock bag and placed the tips of all three frosting bags inside the large tip. This can be tricky but as you can see it worked.