Yes, COFFEES is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, F 4, F 4, E 1, E 1, S 1.

Is it a valid word?

COFFEES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a beverage consisting of an infusion of ground coffee beans
any of several small trees and shrubs native to the tropical Old World yielding coffee beans
a seed of the coffee tree; ground to make coffee
a medium brown to dark-brown color

Also: coffee tree, coffee bean, coffee berry, deep brown, burnt umber.