Remove the silver skin membrane from the back of each rib rack by sliding a knife under it and peeling it away—this allows the seasoning and smoke flavors to penetrate the meat. In a small bowl, combine the salt, pepper, garlic powder, chili powder, onion powder, brown sugar, and smoked paprika to create your dry rub. Pat the ribs dry with paper towels, then generously coat both sides with the dry rub mixture, pressing gently so it adheres well. I like to let the seasoned ribs sit for a few minutes while I set up the pot, which helps the flavors start to develop.
Add the water, apple juice, apple cider vinegar, and liquid smoke to your Instant Pot. These liquids will create steam and infuse the ribs with smoky, complex flavors during cooking. Stir briefly to combine, then place the trivet (metal rack) into the pot—this elevates the ribs above the liquid so they steam rather than boil.
Stand the seasoned ribs upright on the trivet (leaning them against each other if needed), with the meat side facing outward to maximize exposure to the flavorful steam. Close the Instant Pot lid, set the valve to sealing position, and cook on high pressure for 25 minutes. The pressure cooking will tenderize the ribs while the dry rub and liquid smoke infuse them with rich barbecue flavor.
Once the cooking time is complete, turn off the Instant Pot and let the pressure release naturally for 15 minutes—this gentle release helps keep the meat tender and prevents the ribs from drying out. After 15 minutes, carefully open the valve to release any remaining pressure, then remove the lid. Using tongs, carefully transfer the ribs to a baking sheet, being gentle since they'll be tender and delicate.
Generously brush both sides of the ribs with barbecue sauce, coating them evenly. Place the baking sheet under the broiler on high heat for 2-3 minutes, watching carefully to prevent burning—the sauce will caramelize and develop a beautiful glazed exterior. I find that broiling for this short time creates a sticky, flavorful crust that tastes like authentic smoked ribs. If you prefer a thicker glaze, you can broil for an additional 1-2 minutes, just keep an eye on it.