To avoid any health hazards, always opt for the freshest eggs available when making eggnog, and trust your senses to guide you in assessing their quality.
A common step in eggnog recipes is whipping the egg whites into soft peaks. It’s very easy to over or under-whip the egg whites, so you’ll need to pay close attention.
Whipping egg whites into soft peaks by hand is exhausting, and you’re likely to grow tired before you achieve it, so it’s best to use an electric mixer or stand mixer.
Not only is switching to a larger bowl mid-process inconvenient, but it will also leave you with more of a mess, meaning you'll end up with more dishes to clean.
When making eggnog, you’ll also need to whip the yolks. A crucial tip from culinary expert Alton Brown is to avoid adding sugar to the egg yolks at the start.
The key is to first thoroughly whip the egg yolks until they are smooth and well-aerated. After you achieve a consistent, creamy texture, you can gradually add sugar.