
There is something almost meditative about making a proper Japanese stock from scratch β just cold water, a sheet of dried kelp, and a handful of smoky bonito flakes transforming into something deeply savory and complex. The result is a pale, golden broth with a clean umami backbone that forms the foundation of miso soup, noodle broths, simmered vegetables, and so much more. The technique is all about patience and gentle heat: soaking the kombu slowly, warming it just to the edge of a simmer, then letting the katsuobushi steep quietly until it sinks on its own. Rushing any of these steps β or letting the pot reach a full boil β is what separates a bitter, murky stock from one that tastes bright and restaurant-quality. Because this recipe relies on just three whole, unprocessed ingredients, there is no label-reading required and no hidden additives to worry about. It keeps beautifully in the fridge for a few days or the freezer for a month, so making a batch ahead of time is absolutely worth it.
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



Combine the cold water and kombu in a medium saucepan. Let the kombu soak at room temperature for 30 minutes, until the water turns a pale straw-yellow and the kombu has softened and expanded slightly.
Place the saucepan over medium-low heat and warm slowly, uncovered, until the water reaches a bare simmer β small bubbles will begin to rise from the bottom of the pan, about 10 minutes. Do not let it reach a full boil; remove the kombu just before the first rolling bubbles appear, as boiling makes the stock bitter and slimy.
Create a Fig account for step-by-step instructions, access to our full recipe library, and more!
