In a small saucepan add 1 teaspoon of Hon Dashi powder, 2 teaspoons of granulated sugar, and 3/4 cups water. Bring it to a boil for about 2 minutes.
Remove from heat then pour in 3 tablespoons of low sodium soy sauce and 2 tablespoons of Mirin. Give it a good thorough mix and serve with shrimp tempura or make your own tempura batter for fried vegetables.
Pick the best dashi- The type of dashi you choose to use affects flavor. Kombu dashi, for example, has a subtle flavor, but iriko dashi has a more gentle fish flavor. If you're using dashi soup stock, keep this in mind.
Allow it to cool before storing- Let your Tempura Dipping Sauce come to room temperature before you place it in an airtight container to store.
Make a double batch- This sauce stores really well and can easily be frozen. So make a double batch and keep some extra on hand for whenever you want to have some.
Dashi soup stock substitute- Typically, tempura dipping sauce is made with dashi soup stock. However, this can be hard to find. The quickest and easiest way to replace it is by dissolving hon dashi powder with water. Hon dashi powder is easier to find in grocery stores and can be purchased on amazon.com