Using a stand mixer, combine all ingredients and mix on medium speed.
Mix until you see stiffed peaks in your frosting.
Once the frosting is made, split it into 4 bowls
Add about 2-4 drops of each color:
Add the Purple food coloring to the first bowl.
Add the Pink food coloring to the second bowl.
Leave the third bowl white
Add a few drops fo the green food coloring into the last bowl
Scoop the purple frosting, leaving about 1/4 C in the bowl, into the piping bag with the round tip
Scoop one spoonful of the Pink frosting onto one side of the piping bag fitted with all three size star tips
Scoop one spoonful of the Purple frosting onto the other side of the piping bag fitted with the small star tip
Scoop white frosting into the same piping bag as the pink and purple
Scoop white frosting into the two other piping bags with just the pink frosting
Scoop the green frosting into the piping bag with tip number 195
Using the round purple piping bag, pipe a large dollop of frosting onto the cupcake
Dip the cupcake into the sprinkles mixtures
Pipe another dollop of purple frosting onto the top of the sprinkled frosting
Using the large star tip, pipe a dollop of frosting in the top center
Place the unicorn horn into the center of the frosting
Place a ear on both sides of the horn
Using the smaller star tips, pipe dollops of frosting around the frosting to create flowers
Using the green frosting and pipe leafs along the flowers