How Much Dried Onion Equals One Medium Onion? A medium onion is usually replaced by about 1 tablespoon of onion powder, 2 tablespoons of dried minced onion, or 3 to 4 tablespoons of dried flakes, though the exact amount depends on cut size and dryness. Essential Concepts: 1 medium onion = 1 tablespoon powder or 2 tablespoons minced; flakes need more volume; dried onion replaces flavor better than moisture or texture.
