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kombu bonito dashi served in a white bowl with a spoon over a gray counter top

Kombu Bonito Dashi

5 from 1 vote
Learn the simple steps to prepare Kombu Bonito Dashi, a savory Japanese stock essential for adding depth to your cooking recipes.
Prep Time:30 minutes
Cook Time:10 minutes
Total Time:40 minutes
Course: Appetizer, Brunch, Dairy-Free, Lunch, Side Dish
Cuisine: Asian
Keyword: Healthy
Servings: 4 cups
Calories: 197kcal

Ingredients

  • 4 cups water (1 liter)
  • 1 piece kombu (about 4 x 4 inches)
  • 1 cup bonito flakes (about 15g) loosely packed
  • salt to taste

Instructions

  • Wipe the kombu gently with a damp cloth to remove any excess white powder. Do not wash it under water, as that will remove much of the umami.
    1 piece kombu
  • Place the kombu in a saucepan with the water and let it soak for 30 minutes to 1 hour (optional but deepens flavor).
    4 cups water
  • Slowly bring the water with kombu to a near-boil over medium heat. Just before it starts boiling (you’ll see small bubbles), remove the kombu. Boiling kombu can release bitterness.
  • Add the bonito flakes to the hot kombu water. Let it simmer gently for 30 seconds, then turn off the heat.
    1 cup bonito flakes
  • Strain the broth through a fine mesh sieve or cheesecloth into a bowl or container. Don’t squeeze the flakes—you want a clean, delicate flavor.

Notes

  • Do not boil kombu to avoid bitterness—remove it just before boiling.
  • Use fresh bonito flakes for the best flavor and clearer broth.
  • Leftover kombu and bonito flakes can be reused once for a lighter second dashi.
  • Store dashi in the fridge up to 3 days or freeze for longer storage.
  • Perfect base for soups, stews, and simmered dishes—customize to taste!

Nutrition

Serving: 4cups | Calories: 197kcal | Carbohydrates: 0.1g | Protein: 39g | Fat: 0.003g | Saturated Fat: 0.003g | Cholesterol: 40mg | Sodium: 450mg | Potassium: 513mg | Fiber: 0.01g | Sugar: 0.003g | Vitamin A: 1IU | Vitamin C: 0.02mg | Calcium: 8mg | Iron: 0.02mg