Rainbow cupcakes are a colorful and playful twist on a classic dessert. They are made by layering different colors of cake batter into individual cupcake liners, creating a rainbow effect when the cupcakes are cut open. The colors can range from soft pastels to bright and bold hues, making them a fun and festive treat for all occasions. Rainbow cupcakes are often topped with a swirl of buttercream frosting or whipped cream and sprinkles to add even more color and fun. They are a popular choice for birthday parties, baby showers, and St. Patricks Day!