Yes, RUGELACH is a Scrabble word!

Letter values in Scrabble US: R 1, U 1, G 2, E 1, L 1, A 1, C 3, H 4.

Is it a valid word?

RUGELACH is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

pastry made with a cream cheese dough and different fillings (as raisins and walnuts and cinnamon or chocolate and walnut and apricot preserves)

Not playable in Scrabble US: RUGULAH, RUGGELACH.