White Wine Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceWhite wine vinegar has a mild acidic profile similar to lemon juice, which helps to brighten the eggs and balance the richness in a frittata. The acidity also aids in slightly tenderizing the eggs, improving texture.
When using white wine vinegar, measure carefully to avoid overpowering the dish with vinegar notes. Start with less and adjust if needed.
Compared to lemon juice, white wine vinegar offers a subtler citrus note and less aroma, but it effectively preserves the intended acidity and flavor balance in the frittata.