Start by gathering all your ingredients. Cube the chicken and chop the garlic. If you’re using fresh noodles, cook them according to package instructions and set aside.
In a mixing bowl, whisk together the hoisin sauce, tamari or soy sauce, vinegar, chili paste, chopped garlic, ground ginger, black pepper, and chili flakes. This sauce is the star of your 20 Minute Cashew Chicken Noodles. Set it aside.
Heat the sesame oil in a large skillet or wok over medium-high heat. Season the cubed chicken with garlic powder, ground ginger, and black pepper. Once the oil is hot, add the chicken and cook until golden brown and cooked through, about 5-7 minutes.
Sprinkle the arrowroot powder or cornstarch over the cooked chicken and stir well to combine. This will help thicken the sauce. Pour the prepared sauce over the chicken and stir to coat everything evenly.
Add the cooked noodles to the skillet and toss everything together gently. Cook for another 2-3 minutes, allowing the noodles to absorb the flavors of the sauce.
Finally, stir in the cashews and cook for an additional minute until heated through.
Serve your 20 Minute Cashew Chicken Noodles hot, garnished with chopped green onions for a fresh touch.