For the sauce:
- 1/2 cup (packed) golden brown sugar
- 1/2 cup apple butter
- 1/4 cup bourbon whiskey
- 1/4 cup apple cider vinegar
- 3 tablespoons hard cider
- 2 tablespoons Dijon mustard
For the ribs:
- 1 tablespoon coarse kosher salt
- 1 tablespoon (packed) golden brown sugar
- 1 1/2 teaspoons dry mustard
- 1 1/2 teaspoons dried thyme
- 1 teaspoon ground ginger
- 1/2 teaspoon ground cinnamon
- 1/2 teaspoon cayenne pepper
- 2 2- to 2 1/4-pound racks baby back pork ribs
- 1 large onion, sliced
- 1 cinnamon stick, broken in half
- 6 thin rounds peeled fresh ginger
- 1 1/4 cups hard cider
- Prepare the sauce by whisking all ingredients in medium bowl to blend. Set aside.
- To make the rib rub, combine salt, brown sugar, mustard powder, thyme, ginger, cinnamon, and cayenne in a small bowl. Using small sharp knife, loosen membrane from underside of each rib rack and pull off (or score membrane). Rub 1 tablespoon seasoning mix into each side of each rib rack. Place ribs in large roasting pan. Cover and chill at least 6 hours and up to 1 day.
- Preheat oven to 325°F. Lift ribs from pan. Scatter onion, cinnamon stick, and ginger in pan. Pour in cider. Return ribs, meat side down, to pan; cover pan with foil. Roast ribs until meat is tender and begins to pull away from bones, about 2 hours. Uncover; cool at least 30 minutes and up to 2 hours.
- Prepare barbecue (medium-high heat). Grill ribs until heated through and slightly charred, about 5 minutes per side. Brush generously on all sides with basting sauce. Grill until sauce becomes sticky glaze, about 3 minutes longer per side. Transfer rib racks to cutting board. Cut racks between bones into individual ribs. Arrange on platter and serve, passing remaining sauce separately.