Tamari (Best Option)
1 teaspoon per 1 teaspoon soy sauceTamari is a Japanese soy sauce variant that is typically wheat-free and has a richer, less salty profile than regular soy sauce. It provides the umami and saltiness necessary to enhance flavor without adding excess moisture, which is crucial for maintaining biscuit texture.
When using tamari, measure it 1:1 to soy sauce. Because it is slightly less salty, you may want to adjust salt in the recipe slightly if needed. Avoid adding extra liquids to maintain dough consistency.
Compared to soy sauce, tamari produces biscuits with a similar savory depth but can result in a slightly smoother flavor profile and is better suited for gluten-sensitive diets.