Soy Sauce (Best Option)
1 teaspoon per 1 tablespoon of fish sauceSoy sauce works as a substitute because it contains fermented soybeans that provide a similar umami flavor and saltiness to fish sauce, essential for enhancing the savory notes in the pie crust. The lower moisture content compared to fish sauce helps maintain the correct dough hydration balance.
When using soy sauce, reduce the quantity slightly to avoid overpowering the dough with saltiness. Incorporate it evenly to prevent localized wet spots that can affect dough texture.
The final crust will have a comparable savory depth without compromising flakiness or structure, making it the most reliable alternative in pie crust applications.