Tart, delicate juice pressed from unripe grapes. Milder than vinegar or lemon. Used in French and Middle Eastern cooking.
Substitutes
White Wine Vinegar — 1 tbsp white wine vinegar diluted with 2 tbsp water per 3 tbsp verjuice. Diluted white wine vinegar approximates verjuice's mild grape acidity.
Lemon Juice — 1 tbsp lemon juice diluted with 1 tbsp water per 2 tbsp verjuice. Diluted lemon juice provides gentle acidity for deglazing and dressings.
Apple Cider Vinegar — 1 tbsp vinegar + 1 tbsp water per 2 tbsp verjuice. Verjuice (juice of unripe grapes) has milder acidity (~pH 3.0-3.5) than vinegar (~pH 2.5). Diluting apple cider vinegar with equal water approximates verjuice's gentle tartness. Both contain malic acid as primary acid. ACV adds slight apple fruitiness that complements grape-based verjuice's profile.