Miso soup is a traditional Japanese soup with a savory, salty-sweet flavor. Use this easy recipe to make miso soup at home. You only need four ingredients: silken tofu, miso paste, dashi (Japanese soup stock) and dried seaweed. Here’s how to make miso soup: 1. Soak 1/4 cup dried seaweed in warm purified water then drain. 2. Add 4 cups of purified water and 2 tablespoons of dashi to a pot and bring to a boil. 3. Reduce heat to medium and add 1/2 pound of tofu and the seaweed. 4. Remove from heat