Yes, VANILLAS is a Scrabble word!

Letter values in Scrabble US: V 4, A 1, N 1, I 1, L 1, L 1, A 1, S 1.

Is it a valid word?

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

any of numerous climbing plants of the genus Vanilla having fleshy leaves and clusters of large waxy highly fragrant white or green or topaz flowers
a flavoring prepared from vanilla beans macerated in alcohol (or imitating vanilla beans)
a distinctive fragrant flavor characteristic of vanilla beans

Also: vanilla extract.