Easy Oven-Cooked Pulled Pork - Tender & Juicy

Ingredients

• 1 (5 to 6-lb) bone-in pork butt ((sometimes called Boston butt; see note))
• 4 teaspoons salt
• 1 tablespoon paprika
• 1 tablespoon ground cumin
• 1 tablespoon garlic powder
• 1 tablespoon dry mustard
• 1 tablespoon (packed) dark brown sugar
• 1 teaspoon freshly ground black pepper
• 1 cup + 2 tablespoons ketchup
• ¾ cup cider vinegar
• ¾ cup (packed) dark brown sugar
• ¼ cup + 2 tablespoons spicy brown mustard
• 2 cloves garlic, (minced)
• ½ teaspoon cayenne pepper
• ¾ cup water, (for deglazing the roasting pan)
• 12 hamburger buns, (lightly toasted and buttered, if desired)