Spoiler: eel sauce has no eel. Yep, the name’s misleading. What it does have is just 4 ingredients—soy sauce, mirin, sugar, and sake (optional, but we’ll count it). Together they simmer into that glossy, sweet-savory drizzle you get on sushi or grilled eel.The good news? You can make this unagi sauce recipe at home in 10 minutes. Cheaper than bottled stuff, fresher flavor, and way more fun to say, “I made this.”