White Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceWhite vinegar is a strong acid that effectively reacts with baking soda to produce carbon dioxide, which helps the banana bread rise and maintain a light texture. Its neutral flavor profile means it won’t interfere with the banana’s natural sweetness.
To ensure success, measure carefully as vinegar is more acidic; using too much can impart a sharp taste. It’s best to combine it with the wet ingredients to distribute acidity evenly.
Compared to lemon juice, white vinegar lacks citrus notes but achieves similar chemical leavening effects, resulting in a banana bread that is tender and well-risen but without the subtle brightness of lemon.