Egg Nog White Russian

In the spirit of abiding whatever the holidays bring, here's a boozy drink for any time of day. Bathrobe optional...

2/3 oz. coffee liqueur
1-2/3 oz. vodka
1 oz. egg nog

Fill a tumbler with ice, and combine the coffee liqueur and vodka. Float the egg nog on top by pouring it slowly over the back of a spoon. Enjoy.