This is probably one of the most colourful cakes you could make for someone; the rainbow sprinkles/jimmies are eye catching! This is my go to cake recipe when I’m asked to bake a cake for someone’s birthday party. This recipe uses a moist vanilla sponge cake combined with rainbow sprinkles/jimmies baked inside of cake, which is then finished off with a rich vanilla buttercream. It is quick and easy to make so it is a perfect birthday cake recipe for beginners to try.