Mix salt, cornstarch, vinegar together. Spread evenly on sheet and allow to dry 24-48 hours until liquid is gone.

In a food processor, pulse dried mixture until in a fine powder.

Preheat oven to 425 degrees.

In a skillet, cook wings in butter, pepper, and a dash of vinegar until browned.

Toss until coated in vinegar salt powder.

Bake in oven twenty minutes.

Remove from tray, toss in vinegar salt powder; serve.