Tamari (Best Option)
1 tablespoon per 1 tablespoon soy sauceTamari is a Japanese soy sauce variant that is typically gluten-free and has a smoother, less salty profile than regular soy sauce. It preserves the umami and savory notes critical to burger seasoning, enhancing the meat or plant-based patty without overpowering it.
When using tamari, monitor salt levels as it can be slightly less salty; you may want to adjust additional salt accordingly. It blends well in marinades and burger mixes, maintaining moisture and flavor depth.
Compared to regular soy sauce, tamari offers a cleaner, less sharp taste that complements the burger’s natural flavors, making it the closest and most reliable substitute.