In a bowl beat the egg yolks with the 1/2 cup of sugar until thick. In another bowl beat the egg whites with 1/4 cup of sugar until thick. In a third bowl beat the cream until thick. Add the cream to the yolks, fold in the egg whites, and add the milk, Bourbon, vanilla, and a pinch of nutmeg, if desired. Chill in freezer before serving.
Serve eggnog in a large punch bowl.
Consumption of raw or undercooked eggs, shellfish and meat may increase the risk of foodborne illness.