Vegetable Broth (Best Option)
1 cup vegetable broth per 1 cup chicken brothVegetable broth is rich in umami compounds derived from ingredients like mushrooms, seaweed, and vegetables, which mimic the savory depth of chicken broth. This makes it an excellent plant-based alternative that preserves the balance of flavors in Teriyaki Sauce.
When using vegetable broth, opt for a low-sodium version to better control the saltiness, as Teriyaki Sauce already contains soy sauce which is salty. Taste and adjust seasoning accordingly.
The final Teriyaki Sauce will retain its characteristic savory-sweet balance with a slightly lighter mouthfeel compared to chicken broth, making it suitable for vegan and vegetarian diets without compromising flavor.