Is there anything more beautiful than rainbow buttercream? Combine this with delicious chocolate cake along with our favorite mouse and you have a pretty amazing Mickey rainbow buttercream cake.
There's just something so pretty about the colors of a rainbow. Seeing them always makes me happy! I decided to make this Mickey rainbow buttercream cake in celebration of St. Patrick's Day.
But feel free to use this recipe for other holidays and birthdays. May I suggest even using them on top of cupcakes or donuts!
Rainbow Buttercream Technique
- Make your buttercream ahead of time. For this recipe, I used American buttercream which I think works best. Swiss Meringue is also a popular buttercream, but is notoriously difficult to color because of its high butter content. Since we want bright, vibrant colors in our buttercream, we need a base that is as white as possible to achieve this.
- Get creative with your colors. Rainbow can mean many different colors or shades. For this particular buttercream, I used Americolor dusty rose, orange, lemon yellow, turquoise, sky blue and fuchsia.
- Divide the buttercream into 7 different bowls. Tint each bowl of frosting with desired color, making sure to leave one bowl of white for the Mickey clouds.
- Place each color into a sandwich size Ziploc bag. Cut off corner of each bag.
- Place a long piece of plastic wrap onto the counter top. Pipe a long strip of each color (about 6" or so) onto the plastic wrap. Make sure there are no spaces or gaps in between each color.
- Take the end of one side of the plastic wrap, lift and begin to slowly roll. Make sure to not put any pressure as you do not want to smash the colors.
- Twist one end of the plastic wrap so that the buttercream does not come out. The other end, cut up to the buttercream and place this side into a disposable piping bag fitted with a Wilton 1M star piping tip.
- To create the rainbows, pipe buttercream onto frosted cake in the shape of a half circle.
- Add Mickey "clouds" with the remaining buttercream using a Wilton 6b open star piping tip. Pipe Mickeys head and ears in a circular direction, making sure to make the ears slightly smaller than the head.
This rainbow buttercream is the perfect touch for any celebration. Pipe some adorable Mickey shaped clouds to bring a little Disney magic to any cake.
- 2 sticks Unsalted butter, softened
- 4 cups Powdered sugar
- 2 tsp Vanilla extract
- ¼ cup Heavy cream
- Place softened butter and powdered sugar inside electric stand mixer and beat with paddle attachment for 2-3 minutes until light and fluffy.
- Stop mixer and add vanilla and heavy cream.
- Divide frosting into 7 different bowls
- Use food gel to tint each color of the rainbow, leaving one bowl white for the Mickey clouds.
Keywords: vanilla frosting, buttercream, rainbow buttercream