Combine the brown sugar, garlic salt, seasoned salt, seasoned pepper, onion powder, chili powder, ground mustard, paprika, Italian seasoning, and cumin, in a small bowl, and stir well to mix.
Prepare the Ribs
Make sure the membrane on the underside of the ribs has been removed (if it hasn't, grab hold of one corner, and pull it the entire length of the ribs). Season the ribs with the rub on both sides.
Add the chicken broth, and red wine vinegar to the Instant pot. Place the metal trivet in the Instant Pot, and place the ribs on the trivet.
Place the lid on the Instant Pot, making sure that the pressure valve is set to SEALING. Press the MANUAL button, and set the time to 25 minutes.
When the ribs are done, the Instant Pot will beep, and go to the OFF reading. Let the Instant Pot release the pressure naturally. This will infuse all the flavors, and make the ribs really tender. Once the FLOAT VALVE is down, and all the pressure has been released, remove the lid from the Instant Pot, and set aside.
Double line a sheet pan with heavy foil and carefully add the ribs on top. Brush barbecue sauce on the slabs of ribs, completely coating them. Place the dish in the oven on BROIL, for about 5 - 6 minutes, or until the ribs have turned golden brown and caramelized. Remove the ribs, and brush with additional sauce.
Garlic Mashed Potatoes
While the ribs are cooking in the Instant Pot, peel 3 - 4 pounds of white potatoes, and cut them in chunks. Place the potatoes in a large roaster, and cover them with cold water, and about 2 tablespoons of salt. Turn the burner on high, and boil the potatoes until done - about 15 - 20 minutes.
When the potatoes are done, pour off all but about 1/4 of the water, and leave the potatoes in the pan.
Mash the potatoes with a potato masher, and add one stick of butter, one tablespoon of minced garlic, 1/2 cup of heavy cream (or half n half), one tablespoon of garlic salt, and one teaspoon of coarse ground black pepper to the potatoes.
Stir well to combine and keep warm on the lowest setting on the stove. Keep the mashed potatoes covered.
Serve the ribs over the mashed potatoes with garlic toast and a little extra barbecue sauce on the side. Enjoy!
Use either Spare Ribs or Baby Back Ribs. Thanks to the high pressure of the Instant Pot, the ribs will become extremely tender.You can use a different dry rub mix if you would like. I find the homemade dry rub helps add so much flavor to these pork ribs. Don't skip the broiling step. This adds so much flavor through the caramelization process.Make sure you prep your ribs before you season and pressure cook. This is a step you don't want to skip as it is needed for fall off the bone tender ribs. Make sure your seal is in place and your Instant Pot valve is set to sealing when you start to pressure cook. Otherwise steam will release as it cooks, and it will affect the texture of the ribs. You can make more ribs, just as long as they fit in the pressure cooker properly, without overcrowding.