Pour about two tablespoons of light corn syrup onto a small plate. Add a few tablespoons of festive sprinkles to another small plate. Dip the rim of the glass into the corn syrup and allow the excess to drip off. Dip the rim into the sprinkles and set glass aside while you mix the cocktail.
Add about 1/2 cup of ice to a cocktail shaker, along with the vodka, Irish Cream, amaretto, confectioner's sugar, and milk.
Place the lid onto the shaker and shake for 10-15 seconds.