Unwrap the boneless pork picnic and rinse well. Pat dry with a paper towel.
Cut the pork into manageable size pieces.
Sprinkle each piece of boneless pork with the Pork Rub. Rub the pork rub into the meat and set aside.
Turn the instant pot onto the saute setting and heat until the word HOT appears in the display window.
Add the oil and brown each piece of pork on all sides, placing it in a bowl as you brown the remaining pieces. Once done browning hit the cancel button to turn the Instant Pot off.
Add the chicken stock (or water) and Liquid Smoke to the Instant Pot.
Add the browned pork pieces back to the Instant Pot and place the lid on making sure the steam valve is in the center position.
Push the button for the manual setting and then push the + button until it reaches 90 minutes.
Once the pork has cooked for 90 minutes allow the Instant Pot to release the steam naturally (about 20 minutes).
Carefully open the Instant Pot lid and check the pork to see if it is done. It should be fall apart tender. If it isn't recover the Instant pot and repeat the manual cooking setting and cook an additional 10-20 minutes.
Recipe Expert Tips
Calories are for barbecue pulled pork without a bun