Whisk all chow mein sauce ingredients together in a bowl until well combined. Let it sit while you prepare the other ingredients.

Cook the chow mein noodles according to package directions, usually boiling for about 4-5 minutes until tender. Drain and set them aside.

Heat 2 tablespoons of vegetable oil in a wok over medium-high heat. Once hot, add the thinly sliced chicken breast. Cook for about 5-7 minutes until it's golden and cooked through, then remove it from the pan.

Stir-fry the shredded green cabbage and julienned carrots in the same pan for about 2-3 minutes.

Return the cooked chicken to the wok, then add the drained chow mein noodles. Toss everything together to mix well and coat with the remaining oil in the pan.

Pour in the prepared sauce, tossing the noodles until they are glossy and evenly coated. Cook for an additional 2 minutes, letting the sauce thicken slightly.

Add the sliced green onions to the mix. Give it a gentle stir, taste, and season if needed. Serve the Chicken Chow Mein hot.