Ludo Lefebvre's Secret Ingredient For Perfect French Onion Soup - Chowhound

Worcestershire sauce's ability to enhance savory, meaty meals is unmatched. It's a certified umami booster, bringing a depth of flavor not just to Ludo Lefebvre's signature French onion soup, but to a number of dishes (and even drinks). But what makes Worcestershire sauce so amazing, and what is it, exactly? Most home cooks have a bottle stored in their fridge somewhere, but few people know precisely what's in…