- 5 mins
- 10 mins
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Ingredients
- One 1/2-ounce piece of dried kombu
- One 5-gram package dried bonito flakes
- 1 tablespoon soy sauce, preferably white soy
- 3 tablespoons cold unsalted butter, cut into tablespoons
Preparation
Step 1
Put the kombu in a small saucepan and add 2 cups of water. Cover and simmer over moderate heat for 5 minutes; do not boil. Remove from the heat and discard the kombu. Add the bonito flakes and let steep for 2 minutes, then strain the broth into a small saucepan. Bring bonito broth to a boil. Transfer to a blender. Add 3 tablespoons of butter and 1 teaspoon of soy sauce and blend until frothy.