Eggnog is a very popular holiday drink in North America during the Christmas season. In the Ukraine, I have never seen Eggnog during my time there, and I believe most people I've spoken to have not tried it.
One problem though I would see with Eggnog in Ukraine is that most Slavic people don't like sweet drinks. Even icing sugar there is sour and not sickening sweet like in North America.
The good news is that you can put traditional rum or bourbon in it making it more appealing to the new crowds. You don't need to know KFC'S secret herbs and spices to make this either!
Here's a quick recipe:
1. Heat the milk, cinnamon, cloves, and a dash of vanilla. Boil, then remove from heat.
2. Whisk the egg yolks, then whisk in the sugar.
3. Gradually whisk the hot milk mixture into the egg mixture.
4. Cook the mixture over medium heat until thick, then strain to remove the cloves.
5. Stir in the cream, rum, remaining vanilla, and nutmeg. Refrigerate overnight.
For an added treat, here's a clip from National Lampoon's Christmas Vacation. Never give a cousin Eddie anything with alcohol in it!