You can crisp up carnitas in the oven or on the stove: Oven: Preheat the oven to 450º F and position one of the oven racks into the center of the oven. Line a baking pan with foil for easy cleanup later, if desired. Spread pork into an even layer. Add ¼ - ½ cup of the cooking liquid to the shredded pork to moisten. Bake pork for 5 - 10 minutes, or until it reaches the desired crispiness level. Stove: Heat about 1 tablespoon of oil in a nonstick pan or cast-iron skillet over high heat. When the oil is hot, add pork in batches and sear until just crisp. Add about 1/4 cup of the cooking liquid and continue cooking until the liquid reduces down and the meat is nice and crispy.