In a large sauce pot, heat enough vegetable oil to cover the bottom.

Season flour. Dredge pork shoulder and shake off excess flour.

Sear pork shoulder on each side. Remove from pot.

Add 1/2 cup pepsi and malt vinegar. Scrape up the brown bits (fond) as the liquid reduces. Add remaining pepsi when all the fond is lifted.

Cover. Simmer for approximately 3 hours or until pork easily releases from bone.

Variations; Coconut extract, Sriracha, tamari, leeks, caramelized onions, cayenne, crushed pepper flakes, parsely, cilantro, scallions, ginger, lime, pineapple juice, lemon, lemongrass, mirin, sesame oil or seeds,