Eggnog is the holiday drink of America and Britain: milk, cream, egg yolks, sugar, vanilla and plenty of nutmeg, halfway between a custard sauce and a milkshake. It's served cold, in small glasses, with a pinch of freshly grated nutmeg on top.
Here it is COOKED: the custard is brought to 80 °C (175 °F), the temperature at which the yolks thicken and are safe for everyone, children included. It's the only tricky step, and the recipe gives you the cue to get it right even without a thermometer. Once cooled, a whipped egg white (cooked too) makes it light and frothy.
Good to know · It contains eggs and milk, two major allergens. Cooked to 80 °C (175 °F) and cooled quickly, it suits everyone, including children and pregnant women; keep it chilled and drink it within 2 days.