For a fresh and festive twist on a holiday classic, whip up this Eggnog Custard for your nearest and dearest. It’s simple, sophisticated, and super-creamy. The trick is to use your favorite store-bought eggnog as a base and add many, many egg yolks to make this custard holiday-level rich. It’s an excellent option for make-ahead cooking; simply store jars in the fridge and, when you’re ready to serve, sprinkle a little cinnamon on top. It’s perfect for a festive cocktail hour, dinner party dessert, or sweet little holiday gifts.