Vegetable Broth (Best Option)
1 cup per 1 cup chicken brothVegetable broth is made by simmering a variety of vegetables and herbs, which imparts a savory, umami-rich flavor similar to chicken broth. The presence of natural glutamates in vegetables like mushrooms, carrots, and celery helps replicate the depth of flavor.
To maximize flavor, use a high-quality or homemade vegetable broth with a good balance of aromatic vegetables and herbs. Avoid overly watery or bland store-bought versions by simmering with additional herbs if needed.
Compared to chicken broth, vegetable broth results in a lighter soup with a subtle vegetal note but preserves the overall savory character, making it a versatile and effective substitute.