Add the ingredients of Barbecue Sauce into the Instant Pot. Mix with a wooden spoon
Now add ½ cup beef broth and mix it into the sauce (this amount of liquid is needed prevent Instant Pot's "Burn" warning)
Place ribs on top of the sauce with the fat layer on top (to prevent Burn warning). Season with salt and pepper over the ribs right in the pot.
Using a spoon, coat the top of the ribs with the sauce.
Close the lid, make sure it's in the "Lock" position. Turn the vent to "Sealing" position. Push "Meat/Stew" button which defaults to 35 minutes. Your pot will show On.
Once the pressure is built up and valve pops up, the countdown will start from 35 minutes to 0.
Use Natural Release Method to release pressure:
When pressure cooking is over and digital display reads "L0:00", the pot will start beeping. Push "Cancel" to cancel the reheat mode. The digital display will show "OFF". Now just patiently wait for the floating valve to completely drop (this will take 10 to 20 minutes).
Now turn "Venting" knob to venting position. Turn the lid to "Open" position and open the pot. The ribs are done!