There is a bottle of soy sauce that sits in Taiwanese kitchens like a quiet inheritance. It is not the thin, salty liquid many shoppers know from supermarket shelves. It is dark and viscous, pouring slowly and clinging to a spoon, with a deep, malty aroma.

O’Long Black Bean Soy Sauce (Thick) is a naturally brewed black bean yin you (蔭油) from Chiayi, Taiwan, made by San Ying Foods, a family company founded in 1944. The current product listing describes 120-day natural sun fermentation, non-GMO black soybeans, no preservatives, MSG, saccharin or artificial pigments, and a gluten-free formula.

This is more than a finishing condiment. Its concentrated, coating texture makes it useful in braises and marinades, where a sauce can contribute color and flavor as the dish cooks.

Taiwan’s black bean soy sauce tradition

To understand O’Long’s Black Bean Soy Sauce, it helps to know that Taiwanese soy sauce traditions include more than one style. Historical accounts describe black bean soy sauce as an early Taiwanese condiment. In his 1921 work General History of Taiwan, historian Lien Heng recorded that people used black soybeans to make soy sauce and yellow soybeans to make tofu. Black bean soy sauce, known locally as yin you or in-yu, is made differently from many familiar soybean-and-wheat soy sauces.

Some black bean soy sauces are valued for their savory flavor in cooked dishes. This thick style is designed to coat and cling, making it well suited to braising. The listing describes it as a concentrated black bean soy sauce rather than a typical fluid soy sauce.

O’Long is the house brand of San Ying Foods Co., Ltd., founded in 1944 in Chiayi, Taiwan. The company remains family-owned, now across three generations. The product listing says the sauce is naturally sun-fermented for 120 days and made without preservatives, MSG, saccharin or artificial pigments.

Taiwan’s subtropical climate provides warm, sunny conditions for fermentation. The 120-day process is part of O’Long’s traditional brewing approach, allowing time for black soybeans to develop their characteristic savory flavor.

What makes black bean soy sauce different?

If your pantry holds a bottle of Japanese-style soy sauce, a Chinese light soy sauce or dark soy sauce, this is a different style of product. Here’s how O’Long’s Black Bean Soy Sauce (Thick) compares:

The main ingredient: Many familiar soy sauces use yellow soybeans and wheat. O’Long’s product listing identifies 100% non-GMO black soybeans as its main ingredient and says the sauce contains no wheat. The ingredient formulation can differ by product and brand, so check the label when comparing.

The process: Many mass-market products use different brewing methods, including accelerated processes. O’Long describes its sauce as naturally sun-fermented for 120 days. This slower process is part of the product’s character.

Thickness and texture: The “Thick” designation refers to its dense, concentrated consistency. It coats and clings, making it useful for red-braising, marinades, basting and slow-cooked dishes. The product listing describes it as concentrated rather than simply a fluid soy sauce.

Flavor profile: Black bean soy sauce is often described as savory, rich and rounded. One tasting note describes an “almost chocolatey feel.” The draft’s original text also calls the flavor malty and gently sweet. Taste and saltiness can vary by product and dish, so start with a small amount and adjust.

Gluten-free: The current O’Long listing describes this product as gluten-free and says it contains no wheat. If you have celiac disease or a serious allergy, check the package for the complete ingredient and allergen statement.

The takeaway: Many familiar soy sauces are used as a seasoning; O’Long’s thick black bean style is especially suited to dishes where a concentrated sauce can coat ingredients and build flavor during cooking.

O’Long black bean soy sauce vs. familiar American soy sauce

Here’s a quick comparison with the soy sauces many American home cooks keep on hand:

Ingredient style: Many common soy sauces are made with yellow soybeans and wheat. O’Long’s thick black bean soy sauce uses black soybeans and is listed as wheat-free. Always compare the product labels, since recipes differ across brands.

Cooking process: O’Long specifies natural 120-day sun fermentation. Other products may be naturally brewed or made using different processes; the method depends on the brand and product.

Consistency: Standard soy sauce is usually fluid and pours readily. O’Long Thick is concentrated and viscous, so it coats and clings to food.

Use in cooking: A fluid soy sauce is convenient for seasoning, dipping and stir-frying. O’Long Thick is suited to red-braising, heavy marinades, basting and slow-cooked dishes. Use a small amount in stir-fries because it is concentrated.

The takeaway: These sauces are not interchangeable in every recipe. Choose a lighter, fluid sauce when you want a pourable seasoning; choose O’Long Thick when you want a dense sauce for braising or coating.

How to use O’Long Black Bean Soy Sauce (Thick)

The product listing recommends O’Long’s sauce for marinating, basting, stir-frying and dipping. Its concentrated consistency also makes it a natural fit for braising:

• Braising: Add to braised pork, beef or tofu for a glossy, savory sauce that coats each bite.
• Marinating: Use as a marinade base for pork, chicken or beef. Its thick texture helps coat ingredients.
• Basting: Brush onto meats during roasting or grilling for a lacquered-looking finish.
• Stir-frying: Use sparingly and add near the end of cooking to preserve its aroma.
• Dipping: Use as a concentrated dipping sauce, or combine with a little water, vinegar or sesame oil to adjust the texture and flavor.

For a Taiwanese home-cooking favorite, try Lu Rou Fan (Braised Pork Rice).

Recipe: Lu Rou Fan (Taiwanese Braised Pork Rice)

Lu Rou Fan is a comforting Taiwanese rice dish of slow-braised pork belly in a dark, savory sauce. The sauce is central to the dish, and O’Long Black Bean Soy Sauce (Thick) adds concentrated black bean flavor and a coating texture.

Prep time: 20 minutes | Cook time: 1 hour 30 minutes | Serves: 4–6

Ingredients

• 1.5 lbs (680g) pork belly, finely diced, or coarsely ground pork
• 2 tbsp neutral oil
• 6 shallots, thinly sliced
• 4 cloves garlic, minced
• 1 tbsp ginger, minced
• 3 tbsp O’Long Black Bean Soy Sauce (Thick)
• 1 tbsp Pearl River Bridge Superior Dark Soy Sauce, for color
• 2 tbsp Shaoxing rice wine
• 1 tbsp Profusion Rock Sugar or brown sugar
• 1 tsp five-spice powder
• 2 cups water or chicken stock
• 4 hard-boiled eggs, peeled, optional
• Steamed jasmine rice, for serving

Instructions

1. Crisp the shallots. Heat the oil in a heavy-bottomed pot over medium heat. Add the sliced shallots and fry, stirring constantly, until golden brown and crisp, about 5–7 minutes. Remove them with a slotted spoon and set aside. Leave the shallot-infused oil in the pot.

2. Brown the pork. Increase the heat to medium-high. Add the diced pork belly and cook until browned and the fat has rendered, about 8–10 minutes. If using ground pork, cook until no longer pink.

3. Build the aromatics. Add the garlic and ginger and stir-fry for 30 seconds, until fragrant. Pour in the Shaoxing rice wine and let it sizzle for 10 seconds, scraping up browned bits from the bottom of the pot.

4. Add the sauce and braise. Add the O’Long Black Bean Soy Sauce (Thick), dark soy sauce, rock sugar and five-spice powder. Stir to coat the pork. Pour in the water or stock, just enough to barely cover the meat. Bring to a boil, then reduce the heat to low, cover and simmer for 1 hour, stirring occasionally, until the sauce thickens.

5. Add the eggs, optional. Add hard-boiled eggs during the last 20 minutes of cooking so they can absorb some of the sauce.

6. Finish and serve. Stir the reserved crispy shallots back into the pot. Taste and adjust the seasoning. Serve the braised pork over steamed jasmine rice, with sauce and a halved braised egg if desired.

Tips: For a thicker sauce, remove the lid for the last 15 minutes and simmer to reduce. Lu Rou Fan can be made ahead and reheated gently. For a vegetarian version, substitute diced shiitake mushrooms and firm tofu, and use vegetable stock.

Nutrition and allergen information

The product listing does not include numeric nutrition facts. Check the package for serving size, calories, fat, carbohydrates, protein and sodium. The listing describes the sauce as made with black soybeans and gluten-free, but read the package for the full ingredient and allergen information. People managing sodium intake or soy allergies should check the label carefully.

Bring home Taiwanese black bean soy sauce

O’Long Black Bean Soy Sauce (Thick) connects a traditional Taiwanese brewing style with everyday cooking. Its concentrated consistency is useful for Lu Rou Fan, red-braised dishes, marinades and basting.

Ready to cook? Pick up a 400ml bottle of O’Long Black Bean Soy Sauce (Thick) for $8.99 and try it in your next braise.

— The MyAsianStore Team