In a medium size, bowl mixes together the whiskey, apple cider, 2 teaspoons of vinegar, mustard, cayenne pepper, and vanilla.
Place the pork chops in a 1-gallon zip lock bag, pour in the ¼ cup of the whiskey mixture, seal the bag, and work the pork chops through the solution. Refrigerate for 1 – 2 hours; flipping the bag occasionally. Set the remaining whiskey mixture aside.
Remove the pork chops from the bag and pat them dry using paper toweling; salt and pepper the chops. (Discard brine used to marinade)
In a large skillet using the oil brown the chops on both sides. (About 4 minutes on each side) place the chops on a plate and cover tightly with aluminum foil.
Pour the reserved whiskey solution into the skillet, bring to a boil, and reduce heat to medium. Cook until mixture is reduced, and kind of syrupy, to form a glaze. Pour any juices that are collected from the chops into the skillet. Add the butter and remaining 2 tablespoons of cider vinegar. Continue cooking until the glaze is thick and sticky.
Place the chops back in the skillet and flip to coat chops with the glaze. Flip several times while cooking. Cook to a temperature of 145F.