The key point: once you add the miso, don’t let it boil too much! If you boil it for too long, the lovely aroma of the miso will fade away. This time I used dried sardine (niboshi) dashi, but feel free to use your favorite type of dashi! What kind of miso soup do you like? Let me know in the comments ^_^
Chefadora AI has the answer - timers, swaps, step-by-step help.
Remove the heads and guts from the dried sardines.

Add the water and sardines to a pot and let them soak for about 20 minutes.

Cut the tofu and green onion.

Heat the pot. Once it comes to a boil, simmer for about 5 minutes to extract the dashi until fragrant.

Add the tofu and seaweed.

Dissolve the miso. As soon as it starts to boil, turn off the heat.

Add the green onion and pour into a bowl.

Once you add the miso, don’t let it boil too much to preserve its aroma.
Feel free to use your favorite type of dashi instead of dried sardine dashi.
Why should I avoid boiling miso for too long?
Boiling miso for too long can cause its lovely aroma to fade away, which affects the flavor of the soup.
Can I use a different type of dashi?
Yes, you can use your favorite type of dashi instead of dried sardine dashi.
How do I prepare dried sardines for the dashi?
Remove the heads and guts from the dried sardines before soaking them in water.
Can I add other ingredients to this miso soup?
Yes, you can customize the soup by adding ingredients like mushrooms, spinach, or other vegetables.
What type of miso works best for this recipe?
You can use any type of miso based on your preference, such as white, red, or mixed miso.
Hi, I'm Yukumi, a home cook from Japan sharing easy, everyday recipes rooted in Japanese fermentation culture. Koji, miso, amazake, and other fermented staples are at the heart of Japanese cooking — full of deep umami, natural nutrients, and centuries of tradition. My recipes make these ingredients simple and approachable, whether you're new to fermentation or looking to bring more Japanese flavors into your kitchen. Here you'll find recipes for gut-friendly miso soups, koji marinades, fermented seasonings, and more — all designed for a natural, balanced way of eating.
...