The recipe for the best miso soup is a good foundation. And a real, authentic Japanese miso soup starts with dashi. Dashi is a traditional broth of shiitake and kombu (iodine-rich seaweed). Dashi is a must for Japanese people. In addition, it is important that you use a good miso for your miso soup. Preferably one that has fermented for a longer time, because then you can taste those powerful flavors in your soup. Which miso you use for your miso soup determines the taste and the rest of the ingredients. We use genmai miso for this basic recipe for miso soup, because it is gluten-free and therefore suitable for everyone. For the rest of the ingredients, a dash of sesame oil, tamari and tofu is all you need. Silk tofu is often seen in Japan, and is a quick, protein-rich and vegan addition.