Yes, TIMBALES is a Scrabble word!

Letter values in Scrabble US: T 1, I 1, M 3, B 3, A 1, L 1, E 1, S 1.

Is it a valid word?

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

individual serving of minced e.g. meat or fish in a rich creamy sauce baked in a small pastry mold or timbale shell
small pastry shell for creamy mixtures of minced foods

Also: timbale case.