White Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceWhite vinegar is an excellent acidic substitute because it provides the necessary pH level to activate baking soda or tenderize gluten in the dough, similar to lemon juice. The acidity helps to inhibit gluten formation, resulting in a tender, flaky crust.
When using white vinegar, measure precisely as it is more acidic than lemon juice; using too much can impart a sharp taste. It is best to use distilled white vinegar to avoid color or flavor changes.
Compared to lemon juice, white vinegar does not contribute citrus flavor but maintains the chemical function, resulting in a crust that is texturally similar but without the subtle lemon aroma.