When I tested this recipe I tried all kinds of noodles. Spaghetti noodles clumped together...yuck! The rice noodles worked awesome. I tried thick cut, vermiccili, and brown rice noodles. The brown took longer to get soft, and I felt like it meant everything else overcooked a little. The best were the thick white rice noodles, which are also what is most common for pad thai.