Tamari (Best Option)
1:1Tamari is a Japanese soy sauce variant that is typically gluten-free and has a richer, less salty flavor compared to regular soy sauce. It contains similar amino acids and fermentation byproducts that contribute to the umami taste, making it an excellent substitute in stews where depth of flavor is critical.
When using tamari, measure it in equal amounts to soy sauce. Because it is less salty, you may need to adjust salt levels slightly after simmering. Watch for any subtle differences in sweetness or thickness, but these are usually minimal.
The final stew will retain its characteristic dark color and savory depth, with a slightly smoother and less sharp soy flavor, making tamari the closest match to traditional soy sauce.