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Rainbow Sprinkle Funfetti Cake

Hollie Schultz
This Rainbow Sprinkle Funfetti cake is bursting with color and flavor to celebrate any birthday or holiday.
5 from 1 vote
Prep Time 30 mins
Cook Time 15 mins
20 mins
Total Time 1 hr 5 mins
Course Dessert
Cuisine dessert


Cake Ingredients

  • 2 Vanilla Cake Mixes
  • egg, water and oil for the cake mix
  • Food Coloring (your choice)
  • Sprinkles

Vanilla Buttercream Frosting Ingredients

  • 2 sticks butter
  • 4 cups powdered sugar
  • 2 tsp vanilla
  • 2 tbsp milk (or heavy cream)
  • Rainbow Food Coloring


  • Make the 2 (two) vanilla or white cake mixes according to the box instructions. (Or you can make your own homemade cake) I chose a pink funfetti cake but you can choose whatever color you’d like.
  • Add food coloring (of your choice) to cake batter. Mix to incorporate color throughout. Add about 1/2 cup of sprinkles (called “jimmies” in some parts of the country) to the batter and mix.
  • Pour batter into 3 round 8″ pans.
  • Bake at 350 degrees for 15 minutes. Cool completely.
  • ake the buttercream frosting while cakes are cooling.

Buttercream Instructions

  • Blend all ingredients together. That’s it. I kept the frosting white to let the sprinkles on the outside stand out.

Decorating the Cake

  • Stack the layers of cake and frost in between layers.
  • Completely frost the outside of the cake into a smooth layer.
  • Now this is where things can get a bit messy if you aren’t careful. Take small handfuls of sprinkles and lightly press against the cake frosting. You have to do this immediately after frosting the cake BEFORE the frost sets or they won’t still very well.
  • Do this sprinkle smashing method around the cake and then lightly sprinkle more jimmies on top to completely cover.
  • That’s it. You are done and your cake looks amazing!


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