Rim your cocktail glass. Place icing on a plate and sprinkles on another plate. Roll the edges of two martini glasses in frosting, then roll them in sprinkles until coated. Set aside.
Fill a cocktail shaker with ice. Add half-and-half, Irish cream, vanilla vodka, amaretto and vanilla extract. Cover and shake vigorously.
Pour into prepared martini glasses and garnish with a cookie.
Notes
To make your own frosting, combine 1 1/2 cups powdered sugar, 2 teaspoons lemon juice and 1 egg white in a bowl. Whisk until combined.For a non-alcoholic option, get the same sweet taste by using the sugar cookie syrup in a sugar cookie latte or Italian soda!