White Vinegar (Best Option)
1 teaspoon per 1 tablespoon lemon juiceWhite vinegar contains acetic acid which mimics the acidity of lemon juice, crucial for balancing the richness of the custard in bread pudding. This acidity helps to brighten flavors and can slightly tenderize the bread by interacting with the starches.
When substituting, use a bit less vinegar than lemon juice because vinegarβs acidity is sharper. Mix it well into the custard to ensure even distribution and avoid any harsh vinegar notes.
The final bread pudding will retain its creamy texture and have a balanced tang similar to that provided by lemon juice, making white vinegar the most reliable substitute in this context.