Remove the pork butt from the refrigerator and place it on the counter for at least 1 hour or until it reaches room temperature.
Preheat the oven to 275 degrees Fahrenheit.
Place the still-covered baking dish with the pork butt in the oven and set the timer for 2 hours and 30 minutes.
Raise the heat to 350 degrees and continue to cook for one to one and a half hours. Check doneness after an hour by inserting a fork into the pork. If tender, the fork will slide right in without much resistance.
After the timer goes off, remove the baking dish from the oven, remove the aluminum foil, and, using the instant-read thermometer, check the internal temperature of the pork butt.
If the internal temperature is at least 175 degrees, remove the aluminum foil and set the foil aside for later. Raise the oven temperature to 500 degrees.
Set a timer for 10-15 minutes and bake at 500 degrees until the fat cap is beautifully browned and crispy and the internal temperature reaches 190 degrees.
Remove from the oven, loosely cover with the aluminum foil, and allow to rest for a minimum of 10-15 minutes before serving.