1. Remove the pork from the refrigerator and set it aside to come to room temperature – about 1 hour.
2. Preheat the oven to 250 degrees Fahrenheit.
3. You should season the pork well with salt and pepper before placing it fat side up on the roasting pan’s rack.
4. You can cook the pork butt for 40 minutes per pound of pork or until the internal temperature reaches 180 degrees.
5. Proceed to remove the pork from the oven and let it rest for at least an hour in the pan – covered with foil.
6. Preheat your oven to 500 degrees Fahrenheit. You should allow plenty of time for your oven to warm up if it has been turned off – the 500-degree temperature is critical for this phase.
7. Return the meat to the oven (without the foil).
8. Then allow 15-20 minutes for the skin to color and puff up, flipping the pan to equally blister the skin.
9. Then proceed to remove the meat from the oven, tent with foil, and set it aside for another 10 minutes before serving.

You can watch video recipes to know how to cook pork shoulder butt.