If you enjoy a rimmed glass, prep the rim of your glass by wetting the rim of your glass with water and dipping it in cinnamon sugar.
Make the cocktail:
Fill a glass with ice. Add the tequila and eggnog, and with a spoon, stir to combine.
Serve & Garnish:
Top with frothed milk and a dash of cinnamon for added flavor. Enjoy!
Notes
Make this pitcher-sized, yielding 6 servings (on the strong side), by combining 2 pints (32 ounces) of eggnog and 1 ½ cups of tequila in a large pitcher. Add ice and refrigerate until ready to serve.