Egg Cream
(As I knew them from back in Noo Yawk as a yout'.)
Coca Cola glass or similar
Glass 3/4-ish full of club soda or seltzer, whichever is pure CO2 and water, that is, dilute H2CO3. This, from the fountain spigot.
Add milk to 7/8 full. This results in a white foam on top.
Delicately add a thin stream of choc'lit syrup through the white foam so as not to mix it.
Delicately mix the choc'lit syrup into the dilute H2CO3 with a thin spoon or a straw.
This results in a light choc'lit brown drink under a cover of white foam.
Delicious. Takes longer to read this than to make one.
The 3/4 and 7/8 specifications are nominal and may be varied as desired or according to the shape of the glass.
There are local variations, hence the note about Noo Yawk and my yout'. Other syrups such as strawberry or root beer may be used, but this was unheard of in Noo Yawk, it being a rather provincial and stiffnecked and stodgy place. Quite deplorable, in fact.
However, note there are no eggs and no cream in a commercial Egg Cream confectionary beverage disunirregardless of where it is made. I have no idea as to the etymology.
Terry, 230RN