'flat noodles' is correct and usable in written English.
You can use it to describe a type of noodles that are flat, for example, "Lo mein is a Chinese dish made with flat noodles."
The pasta was tagliolini (broad, flat noodles), not tagliatellini.
Old-school marjoram brightens a veal shoulder roast atop sauce-absorbing, house-made flat noodles.
But it's also fodder for debate: crinkled noodles, flat noodles, fresh noodles, no-boil noodles?
The linguini alle vongole, flat noodles blended with New Zealand cockles, lacked briny freshness.
The lad-nar, with its fried flat noodles and vegetables and squid, was more balanced.
They created this dish of flat noodles that could be hidden below a bunch of vegetables.
I especially like pizzichi, a flat noodle with a ruffled end.
I gave my chicken livers a bit more heft, with a flat noodle pasta, using black olive paste for salty bite.
The wide, flat noodle itself has a lovely, lemony taste.
It's a thin, flat noodle rolled up like a garden hose and topped with cheese and a rather bland marinara sauce.
Noodles — ramen, e-fu, flat rice noodles, thin rice noodles and so on — are 80 cents.
