
This foundational Japanese broth is built on just three ingredients β cold water, kombu, and bonito flakes β and the result is a clean, deeply savory liquid that forms the backbone of countless classic dishes. The process is all about patience and gentle heat: the kombu slowly releases its umami into the water before the bonito flakes steep in near-silence, coaxing out that signature smoky, oceanic depth. There's no blending, no heavy technique, and absolutely no nuts or nut-derived ingredients anywhere near the pot, making it a naturally safe choice for anyone navigating tree nut concerns. What you end up with is a broth so delicate and complex it almost feels like cheating β a restaurant-quality base you made in under an hour with pantry staples. Use it right away for miso soup or noodle broth, or stash it in the fridge for up to three days and let it quietly elevate everything you cook this week.
Fig is a food discovery app that helps you find foods and recipes that fit your dietary needs. Whether you have food allergies, intolerances, or follow a specific diet, Fig makes it easy to eat with confidence.
Learn more β4 servings



Use kitchen scissors or a knife to score the kombu with a few shallow cuts along its surface, then place it in a medium saucepan with the cold water. Let it soak for 30 minutes, until the kombu has softened and the water has taken on a faint golden tint.
Set the saucepan over medium-low heat and warm the kombu and water slowly, until small bubbles begin to form at the bottom of the pan and the water reaches about 140β150Β°F (60β65Β°C) β just below a simmer. This should take about 10 minutes. Do not let the water boil.
Create a Fig account for step-by-step instructions, access to our full recipe library, and more!
