soy sauce has been used to flavor foods for over two thousand years.[1] It's a very common ingredient in Asian cuisine. If you make Japanese, Chinese, or Korean food often, it may be worthwhile to learn how to make your own soy sauce, rather than buying it by the bottle, especially if you're concerned about the origin of the ingredients. The recipe provided here is basic and straightforward. Yet, while the ingredients are simple, beware, for making soy sauce is both a long and somewhat smelly process! Nevertheless, it's very gratifying to work on for 3-6 months, then serve it at your dinner table. Keep reading for a detailed recipe.