Yields about 6 cups, serves 8

3 large eggs
1/2 cup sugar
Kosher salt
1/2 cup rum
1/4 cup bourbon
2 Tbs Cognac
2 cups whole milk
1 cup heavy cream
1/2 tsp. nutmeg
1/2 tsp. vanilla extract

Whisk egg yolk in large bowl until they begin to turn light yellow. Add sugar and a pinch of salt, whisk until thick and pale yellow.
Whisk in rum, bourbon, and cognac until well combined.
Whisk in milk, cream, nutmeg and vanilla until well combined.
Chill covered for 4 hours or overnight.

Optional: Whip egg whites to stiff peaks and fold into chilled yolk mixture for ligher eggnog.