β Soy Sauce with Lime Juice (Best Gluten-Free Option)
1 teaspoon soy sauce + 1/4 teaspoon fresh lime juice per 1 tablespoon fish sauceSoy sauce provides a salty, umami-rich base similar to fish sauce, while lime juice adds a bright acidity that mimics the subtle tang of fermented fish sauce. This combination helps maintain the savory depth in waffle batter without introducing fishy notes.
To ensure success, mix the soy sauce and lime juice well before adding to the batter to evenly distribute flavors. Avoid using dark soy sauce as it can darken the batter and alter texture.
Compared to fish sauce, this substitute results in waffles with a slightly less complex umami profile but preserves the overall savory balance, making it ideal for those seeking a more neutral yet flavorful option.