"noodles" is not quite always plural. "A single noodle was artfully wrapped around his fork" "In the movie 'Lady and the Tramp,' there is a famous scene where the two stars are sharing spaghetti, and both begin eating the same noodle, ending with a kiss." When discussing types, you can use either the singular or plural. The singular sounds more formal, and hints that the food is expensive. "Walmart has an in-house brand of cheap noodles." "This boutique sells a handmade buckwheat noodle that costs $15 a pound." The same is true for uncountable nouns: you can add "a" to talk about types, but usually only in formal situations. "The store sold cheap white rice and cheap brown rice." "The store sold a short-grain rice that had been cultivated by a single Italian family for 5 generations."