Cream the butter in a mixer with the paddle attachment until smooth
Add in the powdered sugar one cup at a time
Next add in the milk, vanilla and salt
Beat on high until light and fluffy - about 3 minutes.
Add in the essential or extract and beat for another minute
Add the frosting to a piping bag with a 1M Swirl tip and pipe on top of the cupcakes
Add crushed up candy canes on top to your liking
NOTE: this recipe is for 12-24 cupcakes if you pipe on the frosting - double it for the entire batch made above