Mushroom Yakisoba stir-fry is the ultimate umami-packed version of the classic Japanese street food. Tender noodles get tossed in a sweet-savory sauce and then mixed with an assortment of meaty mushrooms that provide a hearty texture.
Boil yakisoba noodles for 2 minutes until cooked but still firm. Drain and rinse noodles in cold water. Set aside.
Heat oil in a wok or large skillet over high heat. Stir fry onions for 1 minute before adding mushrooms. Cook them for 3 minutes.
Add cabbage and carrots to the wok and stir fry for 2-3 minutes.
Stir in cooked yakisoba noodles along with soy sauce, oyster sauce, brown sugar, and sesame oil. Toss everything together while cooking for 2-3 minutes. Turn off the heat and adjust the taste with salt & pepper as desired.
Transfer yakisoba to serving plates. Sprinkle with green onions. Drizzle with mayo and okonomiyaki sauce (optional). Enjoy!