An Egg Creme (or cream) has neither eggs nor cream; it is as New York as one gets! Specifically Brooklyn altho some will say that the Bronx and Manhattan can also lay claim to it - don't believe them. The ingredients in a traditional egg creme are chocolate syrup (the true traditionalist will only use Brooklyn's own Fox's U-Bet), milk and seltzer (aka carbonated water), stirred to a frothy head.
The derivation of the name is disputed...some say it comes from the Yiddish expression "echt keem" which translates to "pure sweetness"; others claim it is from the French "chocolate et creme". Does it matter? Not to me. I recommend some variations - vanilla also works and I confess, a few years ago I experimented (o so non-traditional) and used kahlua. Ah, my fav beverage any way one makes it!
@granagringa I don’t think I have ever heard of this before. It sounds like it might be an acquired taste, but I love the Dutch tilt on your photo of it.
One of my favorite drinks which I could only get when I lived in Massachusetts. There was a place here that had them for a year or two but out of business. But went out of business. Enjoy one for me.