Step 1: Prep and Season the Ribs - Start by patting the ribs dry with paper towels. This helps the seasoning stick better and keeps the sauce from getting watery. Sprinkle both sides of the ribs with salt, pepper, and garlic powder. I like to really rub the seasoning in with my hands so every bite has flavor. If your rack of ribs is too large for the slow cooker, just cut it into smaller sections so everything fits comfortably.
Step 2: Make the Root Beer BBQ Sauce - In a medium bowl combine the root beer, barbecue sauce, brown sugar, and Worcestershire sauce. Stir everything together until smooth. Right away you will notice how rich and sweet the sauce smells. That root beer blends into the barbecue sauce in the best way possible. It smells like summer cookouts and comfort food all at once.
Step 3: Add Everything to the Slow Cooker - Place the seasoned ribs into the slow cooker. Pour about half of the sauce mixture over the ribs, making sure they are coated well. Save the remaining sauce for later because that is what gives the ribs their sticky caramelized finish at the end. Cover the slow cooker with the lid and let everything cook low and slow until the ribs are tender.
Step 4: Cook Until Tender - Cook the ribs on LOW for 6 to 8 hours or HIGH for 4 to 5 hours. I personally prefer LOW because the meat becomes incredibly tender and flavorful. By the time they are done your kitchen will smell amazing. The ribs should be so tender that you need to handle them carefully when removing them from the slow cooker.
Step 5: Broil for That Sticky Finish - Line a baking sheet with foil and carefully transfer the ribs onto it. Brush the ribs generously with the remaining barbecue sauce mixture along with a little sauce from the slow cooker. Place the ribs under the broiler for 3 to 5 minutes until the sauce becomes sticky and caramelized around the edges. Keep a close eye on them because the sugars in the sauce can brown quickly.
Step 6: Serve Warm and Enjoy - Brush the ribs with one more layer of sauce before serving. That final coat makes them extra glossy and flavorful. Serve them warm with plenty of napkins because these ribs are gloriously messy in the best possible way.