Tamari (Best Option)
1 teaspoon per 1 tablespoon soy sauceTamari is a gluten-free soy sauce variant that retains the essential umami and salty characteristics needed to replicate soy sauce's contribution to Hollandaise. Its smoother and less harsh flavor profile complements the rich butter and egg emulsion without overpowering it.
When using tamari, start with a slightly smaller amount and adjust to taste, as it can be less salty than regular soy sauce. Ensure it is well incorporated to maintain the sauce's smooth texture.
Compared to soy sauce, tamari preserves the balance of flavors in Hollandaise, keeping the sauce delicate and buttery while adding a subtle savory depth.