Black Cow (1917) ★★★

Sarsaparilla can be difficult to find nowadays. If you can't, root beer is an acceptable substitute. The flavour will be somewhat different, but it's the same idea.

BLACK COW
Use a large Mixing glass with Lump Ice.
2 jiggers of Cream.
1 bottle Sarsaparilla.
Stir well and serve with Straws.

The Verdict:
Mr. Man called this the "anti-float" because it tastes pretty much like a root beer float, except with melted ice cream. The cream makes this really, really rich. Also, it was a lot of milkiness - too much for me. I would probably drink this again if it was with maybe 1 ounce of cream. If you love really creamy floats, I bet you would like this. 

Modernized Recipe:
(Adapted from The Ideal Bartender)

ICE CUBES
1 bottle SARSAPARILLA
3 ounces CREAM

1. Place the ice cubes in a large glass. Pour in the sarsaparilla and cream.
2. Mix well and serve with straws.