Step 1: Melt the butter over medium-low heat in a saucepan. Add the vinegar, black pepper, sugar, cayenne, hot sauce, and salt. Bring to a simmer, stirring until the sugar and salt dissolve.
Step 2: Taste for seasoning, adding more cayenne or hot sauce if desired. Keep warm. Use as a mop or a dip for pork steaks, ribs, or chicken.