How to Distinguish Between Light Soy Sauce, Dark Soy Sauce and Oyster Sauce?

In kitchens around the world, a variety of condiments can be found, among which light soy sauce, dark soy sauce, and oyster sauce stand out. These three condiments look similar at first glance, so how do we distinguish them? In the following, we will explain how to differentiate these three common condiments.

Dark soy sauce: It is close to black in color, has a lighter taste than light soy sauce, and has a slight sweetness. It is often used to color and enhance the aroma of food.It is based on soy sauce, with salt and caramel added, and after two to three months of drying, the color can be obtained by sedimentation and filtration, so the color will be deeper, with a brownish sheen. If you taste the dark soy sauce alone, it will give you a fresh and slightly sweet feeling. Generally speaking, dark soy sauce is used for coloring. Light soy sauce: the color is lighter, reddish-brown, and tastes salty. It is mainly used for seasoning and is suitable for cold dishes or stir-fried dishes.

Light soy sauce: It is suitable for general cooking and can increase the taste and color of dishes. The first extracted soy sauce is called "head oil", which has the lightest color and the freshest taste. In soy sauce, the higher the proportion of oil in the first extract, the higher the quality grade.

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Oyster Sauce: The main ingredient is made from simmered oysters and is primarily used to enhance the freshness of dishes, typically added just before serving. Oyster sauce differs from soy sauce and dark soy sauce. It is not a seasoning for soy sauce but rather a seasoning made from oysters. Although it is called oyster sauce, it is not actually oil; instead, it is the thick broth that is poured over the cooked oysters. As a result, we also see a lot of oyster sauce. Generally speaking, oyster sauce is used to add flavor, because the taste of seafood can add a lot of color to the dish. However, oyster sauce is easy to spoil after opening, so it should be put in the refrigerator after opening

Light soy sauce, dark soy sauce, and oyster sauce differ in their uses, color, and production process.

①Uses
Light soy sauce: Primarily used for seasoning, suitable for stir-frying, cold dishes, and dipping sauces. Light soy sauce has a lighter color and a savory taste, enhancing the freshness of dishes.
Dark soy sauce: Mainly used for adding color and shine, suitable for braised dishes, stews, and other recipes requiring a darker appearance. Dark soy sauce has a deeper color, giving dishes a more vibrant and glossy look.
Oyster sauce: Used to enhance flavor, suitable for stir-frying, braising, and mixing dishes. Oyster sauce has a rich, savory taste that significantly boosts the flavor of dishes but is not ideal for spicy or pickled dishes.

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②Color
Light Soy Sauce: Lighter in color, reddish-brown, clear and transparent.
Dark Soy Sauce: Darker in color, deep reddish-brown or brownish.
Oyster Sauce: Darker in color, thick and sauce-like.

③Production Process
Light Soy Sauce: Made from soybeans, wheat, etc., extracted after natural fermentation.
Dark Soy Sauce: Produced by sun-drying and sediment filtration based on light soy sauce, with a longer production time.
Oyster Sauce: Made by boiling oysters, extracting juice, concentrating, and refining with added ingredients.

These are the ways to distinguish between soy sauce, dark soy sauce and oyster sauce. I believe that after reading this article, you can better distinguish these three condiments, so as to help you cook more delicious dishes.
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Post time: May-06-2025