Wash your ribs and dry them. Remove the skin membrane from the back side of your ribs (This is a very important step. If you do not remove the membrane from the back of the ribs, it will make your ribs tough and prevents the ribs from soaking up the flavors of the rub. I put my ribs meat side down on the cutting board and take one of my very sharp knives and run in very shallow to start the end of the membrane and then I use my fingers to pull off.)
Put the dry rub ingredients (salt, pepper, cumin, chili powder, garlic powder, paprika and dried red chili flakes) into a small bowl and mix.
Sprinkle the dry rub ingredients all over the ribs. Rub the dry ingredients all over front back and sides of ribs to get the flavors into the meat.
Place the wire rack into your pressure cooker (instant Pot) Set your ribs in a semi-circle around the edge of the pressure cooker.
Mix the pressure cooker (instant Pot) Wet ingredients (chicken broth and apple cider vinegar) together. Pour into the bottom of the pressure cooker.
Set your pressure cooker to high pressure and make sure the vent is closed for 24 minutes. Allow the natural release of pressure for 10 minutes. Then, you can do a quick release of pressure. Stay safe and use an oven mitt to protect your hand and turning the vent away from your face.
In the meantime, make your homemade Caramelized onion BBQ sauce: In a small pan place olive oil and onions and sauté slowly and gently until slightly golden. Add garlic and stir until aromatic. Then, add tomato sauce, date paste, apple cider vinegar, Worcestershire sauce, Dijon mustard, dried hot red pepper flakes (optional) and salt and pepper to taste.
Taste BBQ sauce and adjust seasonings as required. If you want it sweeter, add a little more date paste. Cook on stove top over low heat for about 10-15 minutes until the flavors have a chance to mingle. Set aside.
Preheat the oven to broil or you can Preheat outdoor grill, if you prefer. Broil your ribs for 2-4 minutes until they are lightly browned. Keep a super close eye on them so they do not burn. You can also finish your baby back ribs off on the grill just 5-8 minutes on each side or until lightly browned or a few grill marks.
Step 9: Serve up Pressure Cooker BBQ Ribs with plenty of napkins as this is one finger licking good experience. Enjoy!