Is miso vegan?

Miso is a traditional Japanese seasoning made by fermenting soybeans with salt and koji, a type of fungus. The mixture is aged for months or years, developing a deep, savory flavor known as umami. While soybeans are the most common base, miso can also incorporate grains like rice or barley, which affects its color and taste. People often ask if miso is vegan because it is a staple in plant-based cooking, yet some varieties include non-vegan ingredients.

The vegan status of miso is not always straightforward because certain types, particularly those labeled as 'awase' or mixed miso, may contain dashi—a broth made from bonito fish flakes. Additionally, some commercial miso pastes add fish-based stock for extra flavor. However, traditional miso made solely from soybeans, salt, and koji is inherently vegan. The fermentation process itself is plant-based, so the core product is suitable for vegans unless animal-derived additives are included.

To ensure miso is vegan, check the ingredient list for any mention of fish, bonito, dashi, or seafood extracts. Look for labels that specify 'vegetarian' or 'vegan,' or opt for white or yellow miso, which are typically simpler. If uncertain, choose miso from brands that explicitly state their products are plant-based. As an alternative, you can make your own miso at home using only soybeans, salt, and koji, guaranteeing a vegan result that is also free from preservatives.