Using the standing mixer, combine the egg whites, cream of tarter, vanilla and powder sugar and mix until combined and stiff peaks form
Using the piping bag, pipe out 24 thick snowflakes
Line cupcake pan with the purple cupcake liners
In a medium bowl, add the cake mix, butter, milk, and vanilla extract, food coloring and stir until combined
Fill cupcake liners 3/4 of the way full.
Bake in the oven for about 21 minutes.
Pull out the cupcakes and allow to cool before frosting.
Using a stand mixer, combine all ingredients and mix on medium speed.
Mix until you see stiffed peaks in your frosting.
Split the frosting into two bowls, leaving one of them white
Mix in the 1-3 drops of purple food coloring into the second bowl and mix until you get a light lilac color
Using a butter knife, scoop the lilac color onto three sides of the piping bag
Frost the cooled cupcakes and sprinkle some white sprinkles
Carefully peel of a snowflake and place into the side of the frosting