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Soy Sauce – A complete Guide

  • 9 min read

An Introduction to Soy Sauce

No Asian cuisine is complete without the salty, umami-rich flavor of soy sauce. A staple condiment that’s used in cooking and served at the table, soy sauce has an unmatchable depth of flavor that enhances dishes in a unique way. In this comprehensive guide, we’re going to delve into all things soy sauce, from its ingredients and types to its nutritional facts and shelf-life.

Soy Sauce Ingredients

The main ingredients of soy sauce are simple and straightforward: soybeans, wheat, salt, and water. However, it’s the process of fermentation that gives soy sauce its characteristic flavor. The soybeans are cooked and then mixed with roasted grains, usually wheat, and a fermentation culture. This mixture is left to ferment, after which it’s pressed to extract the liquid that becomes soy sauce.

Types of Soy Sauce

Soy sauce is not just one thing; there are several different types of soy sauce, each with its own unique flavor profile and uses. Here’s a quick overview of the most common types:

  1. Light Soy Sauce: This is the most commonly used soy sauce, perfect for adding a salty flavor to dishes without darkening the color too much.
  2. Dark Soy Sauce: This is thicker, darker, and less salty than light soy sauce, with a sweeter, more complex flavor. It’s often used for color in stews and marinades.
  3. Tamari: A Japanese variant, tamari is typically wheat-free (but always check labels) and has a rich, smooth flavor.
  4. Shoyu: Another Japanese style, shoyu includes both soybeans and wheat, leading to a balanced and slightly sweet flavor.

Gluten-Free Soy Sauce

Traditional soy sauce contains wheat, making it unsuitable for those following a gluten-free diet. However, there are gluten-free alternatives available. Tamari, for example, is a Japanese soy sauce made almost entirely from soybeans, and most brands are gluten-free. Always check the label if you need to avoid gluten.

Soy Sauce Nutrition Facts

Soy sauce may be flavorful, but it’s also surprisingly low in calories. A tablespoon typically contains around 9 calories, with minimal fat and around 1 gram of protein. The main nutritional concern with soy sauce is its high sodium content. Regular soy sauce can contain over 900mg of sodium per tablespoon, which is around 38% of the recommended daily intake.

Low-Sodium Soy Sauce

To cater to those watching their sodium intake, many brands offer a low-sodium version of soy sauce. These versions are brewed in a similar way to regular soy sauce, but with a roughly 40% reduction in sodium. This makes it a better choice for those on low-sodium diets, but keep in mind that it’s still high in sodium compared to many other foods.

Homemade Soy Sauce Recipe

For the culinary adventurers out there, making homemade soy sauce is a possibility. It involves cooking soybeans and wheat, then combining them with a special mold to start fermentation. The mixture is then left to ferment for several months before being pressed and strained. The resulting liquid is boiled and finally becomes homemade soy sauce. This laborious process gives you an appreciation of the time and effort that goes into making this humble condiment.

Cooking with Soy Sauce

Soy sauce is a versatile ingredient, fitting into various cooking applications. It can be used as a marinade, a dipping sauce, or as a seasoning in stir-fries and soups. It gives dishes a rich, umami flavor that is hard to replicate with any other ingredient. It’s used extensively in Asian cuisine, but its versatility has made it popular in various cuisines around the world.

Soy Sauce Substitutes

In situations where soy sauce is not available or suitable (such as for those with soy allergies), several substitutes can be used. Tamari, a Japanese sauce made mainly from fermented soybeans, is a great alternative, especially for those seeking a gluten-free option. Coconut aminos, made from fermented coconut sap, can also mimic soy sauce’s salty and umami flavor, and it’s both gluten-free and soy-free.

History of Soy Sauce

The origin of soy sauce can be traced back to China over 2000 years ago during the Western Han dynasty. Originally, it was a byproduct of fermenting fish, but the process evolved over time. The sauce we recognize today became popular during the Song Dynasty (960–1279). From China, the art of making soy sauce spread to Japan and other parts of Asia, with each region adding its unique twist to the recipe.

Soy Sauce Brands

There are numerous brands of soy sauce available in the market, each offering its unique flavor profile. Some well-known brands include Kikkoman, Lee Kum Kee, and Yamasa. Depending on the region, the flavor, texture, and even color can vary significantly. It’s worth experimenting with different brands to discover your personal preference.

Soy Sauce in Asian Cuisine

In Asian cuisine, soy sauce is more than just a condiment; it’s a vital ingredient. In Chinese cooking, it’s used in everything from marinades to stir-fries. Japanese cuisine uses it as a base for soups, dipping sauces, and as a flavoring agent in sushi and sashimi. Similarly, in Korean cuisine, soy sauce is used in a variety of dishes, including their famous bulgogi and bibimbap.

Soy Sauce Allergies

Those with soy or wheat allergies need to be cautious as soy sauce is traditionally made from both soybeans and wheat. Reactions can range from mild, like hives, to severe, such as anaphylaxis. It’s essential to read labels carefully. Thankfully, alternatives like tamari (made without wheat) or coconut aminos (soy-free) are readily available.

Dark vs Light Soy Sauce

Soy sauce comes in various types, the most common being dark and light. Dark soy sauce is thicker, darker, and less salty but sweeter than its light counterpart, mainly due to the addition of molasses or caramel and a longer brewing process. Light soy sauce is thinner, saltier, and used more for seasoning and cooking, while dark soy sauce is often used in braises or as a color enhancer.

Storing and Shelf-Life of Soy Sauce

Properly stored soy sauce can last a long time. An unopened bottle can be stored in a cool, dark place for up to three years. Once opened, it’s best to keep it in the refrigerator where it can last for up to two years. However, the flavor is optimal in the first few months after opening.

Soy Sauce FAQs

What is soy sauce made of?

Soy sauce is typically made from soybeans, wheat, salt, and fermenting agents like molds, yeasts, and bacteria.

What is the difference between light and dark soy sauce?

Light soy sauce is thinner and saltier, while dark soy sauce is thicker, less salty, and has a bit of sweetness.

Is soy sauce vegan?

Traditional soy sauce is vegan as it’s made from soybeans, wheat, and salt.

Is soy sauce gluten-free?

Regular soy sauce contains wheat, thus is not gluten-free. However, gluten-free varieties are available.

Does soy sauce have a high sodium content?

Yes, soy sauce is high in sodium. Low-sodium varieties are available for those watching their intake.

Can I use soy sauce as a salt substitute?

Soy sauce can be used as a flavorful substitute for salt in many dishes, but remember it is high in sodium.

How should I store soy sauce?

Unopened soy sauce can be stored at room temperature. After opening, it’s best to store it in the fridge.

What is Tamari?

Tamari is a type of Japanese soy sauce that’s usually gluten-free and has a richer, less salty flavor.

How long does soy sauce last?

An unopened bottle can last up to three years. Once opened and stored in the fridge, it can last up to two years.

Can soy sauce go bad?

Over time, the quality of soy sauce can degrade, but it’s unlikely to go “bad” in the sense of becoming unsafe to eat.

What can I use as a soy sauce substitute?

Tamari, Worcestershire sauce, and liquid aminos can all serve as soy sauce substitutes.

Does soy sauce contain MSG?

Some brands of soy sauce contain MSG, but many do not. Check the label if this is a concern.

Is soy sauce keto-friendly?

Soy sauce can be included in a keto diet in moderation due to its low carb content.

What are some common dishes that use soy sauce?

Soy sauce is used in many Asian dishes like stir-fry, sushi, marinades, and dipping sauces.

Is soy sauce healthy?

In moderation, soy sauce can be part of a healthy diet. However, it is high in sodium.

Can people with a soy allergy consume soy sauce?

No, people with a soy allergy should avoid soy sauce.

What is the difference between Chinese and Japanese soy sauce?

Japanese soy sauce is typically sweeter and less salty than Chinese soy sauce.

Is there alcohol in soy sauce?

Some soy sauces may contain a small amount of alcohol due to the fermentation process.

Why does soy sauce taste salty?

The saltiness comes from the high sodium content, which is part of the fermentation process.

Can I make homemade soy sauce?

Yes, though the process is lengthy and requires several ingredients including soybeans and wheat.