- 1 (2 pound) slab pork baby back ribs, cut into 3- to 4-rib portions
- 1 teaspoon ground black pepper
- 1 teaspoon Chinese five-spice powder
- Sauce:
- 2 cups hoisin sauce
- 1 cup pineapple juice
- 3 green onions, diced
- 2 tablespoons rice wine vinegar
- 2 tablespoons sesame oil
- 1 tablespoon brown sugar, or more to taste
- 1 tablespoon bottled minced ginger
- 1 tablespoon bottled minced garlic
- Place baby back ribs portions in the bottom of a slow cooker; sprinkle black pepper and five-spice powder on top.
- Mix hoisin sauce, pineapple juice, green onions, rice wine vinegar, sesame oil, brown sugar, ginger, and garlic in a bowl to make sauce. Pour 2/3 of the sauce over the ribs. Refrigerate remaining sauce.
- Cook ribs on Low, basting occasionally with sauce, until tender, 6 to 8 hours.
- Transfer ribs to a serving dish. Brush remaining sauce on top.