In a small saucepan over medium heat, combine the soy sauce, honey, brown sugar, rice vinegar, sesame oil, garlic, and ginger. Stir to combine.
Bring to a gentle simmer and cook for 3 minutes, stirring occasionally, until the garlic softens and the sugar dissolves.
In a small bowl, whisk together the cornstarch and cold water until smooth. Pour into the saucepan and stir immediately.
Continue cooking for 2 more minutes, stirring constantly, until the sauce thickens to a glossy, sticky consistency.
Remove from heat and let cool for 2 minutes before tossing with wings or storing.
Notes
The cornstarch slurry is key — don't skip it or the sauce won't cling to the wings properly. For a spicier version, add ½ teaspoon of chili flakes or a drizzle of sriracha at the end. Store in an airtight jar in the fridge for up to 1 week. Reheat gently before using.