White Vinegar (Best Option)
1 tablespoon per 1 tablespoon of lemon juiceWhite vinegar is a clear, mild acid that reacts with baking soda to produce carbon dioxide, which helps waffles rise and become fluffy. Its neutral flavor profile makes it ideal for recipes where lemon juice's acidity is needed without added citrus flavor.
To ensure success, measure precisely and mix well into the batter to distribute the acid evenly. Avoid overuse, as excess vinegar can impart a sharp taste.
Compared to lemon juice, white vinegar preserves the waffle's texture and rise effectively, with only a subtle difference in flavor that is generally unnoticeable.