Slow-Cooked Pork Baby-Back Ribs

Ingredients :

• For the Dry Rub
• 1/4 cup (packed) golden brown sugar
• 3 tablespoons paprika
• 2 teaspoons freshly ground black pepper
• 1 teaspoon dried oregano
• 1 teaspoon ground cumin
• 1/4 teaspoon cayenne pepper
• 2 (2 1/2-pound) racks baby back pork ribs
• 1 tablespoon kosher salt
• mesquite wood chips soaked in water for 1 hour
• aluminum broiler pan
• For the Barbecue Sauce
• 2 tablespoons unsalted butter
• 1 whole onion (chopped)
• 2 cloves garlic finely chopped
• 1 teaspoon paprika
• 1 cup white distilled vinegar
• 1/2 cup brandy