Worcestershire sauce is one of those ingredients that exists in 98 percent of kitchens. Maybe the bottle is brand new. Maybe it’s six years old. But regardless of age, it’s most likely there. Which begs a couple questions: Why do I have this stuff? What do I use it for besides that one recipe I used it in that one time? And what is Worcestershire sauce in the first place?

Well, we could go into the history of the sauce, explaining its English origins, copyright battles over the name, and just how many people have tried to replicate the original recipe. But when it comes to history, the only thing you really need to know is that this sauce was first made by the company Lea & Perrins in Worcestershire, England.

And there are about as many ways to incorrectly pronounce Worcestershire as there are ingredients in Worcestershire sauce. It’s a sauce with a tremendous depth of flavor, and all that flavor is the result of many different ingredients being fermented individually, blended, and fermented again. There are some vegan and vegetarian versions of Worcestershire sauce, but for the most part, the regular versions contain the following: Vinegars. Fermented onions. Fermented garlic. Molasses. Tamarind paste. Salt. Sugar. Cured anchovies. And a seasoning mixture that can include spices like coriander, mustard seed, cloves, or pepper, as well as citrus peel.

Yeah: There’s a lot going on in that bottle. And that means there’s a lot of flavor. Worcestershire sauce is really an umami delivery vehicle, a cousin to fish sauce or soy sauce that the family kind of forgot about. And we tend to forget about it, too—but at the end of the day, you can use Worcestershire to add flavor to anything saucy much in the same way you’d use soy or fish sauce.