Looking for Dark Soy Sauce Recipes to use up that old bottle of sauce in your pantry? Give these 21 best recipes with dark soy sauce a try. We have something for everyone, from Mongolian lamb to saucy stir-fried noodles! Dark soy sauce is a condiment used in Chinese cooking. It's similar to regular soy sauce but has a thicker texture, darker color, and slightly sweeter flavor. Try these recipes using dark soy sauce today!