Takoyaki sauce is a sweet-savory brown sauce specifically for takoyaki.
You can find it at the Japanese or Asian grocery store.
How to Make Homemade Takoyaki Sauce
If you can’t find Takoyaki Sauce, you can make it with the condiments in your pantry.
Recipes Using Takoyaki Sauce
If you already have it, you can swap it for yakisoba sauce, tonkatsu sauce, or okonomi sauce. The balance of sweet and savory flavors, ingredients, and viscosity slightly differ but won’t be a huge noticeable difference.