If you desire a thicker Teriyaki sauce, add 2 teaspoons of cornstarch dissolved in a little bit of water to the sauce. Cornstarch will help thicken the Teriyaki sauce and let it bind more to the outside of the chicken.
Dispose of the marinade. It may contain bacteria or other microorganisms from the raw chicken and thus cannot be used for anything else. [2] X Research source To dispose of, place into an unwanted plastic bag or non-recyclable container you’re throwing out anyway, and toss in the garbage.
In order to avoid burning, cover the bottom of the pan with more of the reserved Teriyaki sauce and let it simmer. [3] X Research source When you are simmering chicken thighs in the sauce, you can thicken the sauce putting some flour around the chicken.