Tamale is English, tamal is Spanish. 
Either is fine but:
Un tamal por favor =
One tamale please
PS. Gemme did you check in the Spanish aisle where the dried peppers are? That's where they'd be.

Either is fine but:
Un tamal por favor =
One tamale please
PS. Gemme did you check in the Spanish aisle where the dried peppers are? That's where they'd be.