White Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceWhite vinegar is a clear, acidic liquid that effectively reacts with baking soda to produce carbon dioxide, which helps scones rise and develop a light texture. Its acidity level is comparable to lemon juice, making it a reliable substitute in baked goods.
When using white vinegar, measure precisely to avoid an overpowering taste. Mixing it thoroughly with wet ingredients before combining with dry ingredients ensures even leavening. The vinegar aroma typically bakes off, leaving a neutral flavor.
Compared to lemon juice, white vinegar does not contribute citrus notes but preserves the tender crumb and rise, resulting in scones that are texturally similar but less bright in flavor.