Yes, TRUFFLES is a Scrabble word!

Letter values in Scrabble US: T 1, R 1, U 1, F 4, F 4, L 1, E 1, S 1.

Is it a valid word?

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

any of various highly prized edible subterranean fungi of the genus Tuber; grow naturally in southwestern Europe
edible subterranean fungus of the genus Tuber
creamy chocolate candy

Also: earth-ball, chocolate truffle.