Preheat the grill to 300 degrees Fahrenheit by turning all your burners on to low. You want to keep the grill heated to 300 degrees throughout the grilling process.
Prepare 1 rack pork baby back ribs by removing the membrane and patting them dry with a paper towel. Place the ribs in a large disposable aluminum pan.
In a small bowl, mix 1 tablespoon brown sugar, 2 teaspoons paprika, 2 teaspoons salt, 1 teaspoon black pepper, 1 teaspoon garlic powder, and 1 teaspoon onion powder. Rub the spice mixture on both sides of the ribs.
Turn the ribs so the bone side is facing up. Pour 1 cup apple juice into the bottom of the aluminum pan and cover tightly with aluminum foil.
Place the pan of ribs on the grill. Cook for 2 ½ - 3 hours; the ribs are ready when they reach an internal temperature of 190-200 degrees and are tender.
Remove the foil from the pan and baste with some of the 1 cup homemade or store-bought BBQ sauce. Carefully flip the ribs over and baste with more of the sauce.
Place the ribs directly on the grill over medium heat. Cover the grill and cook for 5 minutes. Flip the ribs and cook for an additional 5 minutes.
Remove the ribs to a large tray or serving platter and let rest for 10 minutes. Cut the ribs between the bones and serve.
Notes
Storage and Make-Ahead Instructions
Leftovers: Store leftover ribs in an airtight container in the fridge for up to 5 days.
To Freeze: Wrap tightly in plastic wrap and store in a freezer-safe container or zip-top bag for up to 2 months. Thaw in the refrigerator overnight. Reheat in the microwave in 30-second intervals or in the oven at 300°F until heated through.
Make Ahead: Make the spice rub up to 3 months in advance.