Preheat a charcoal grill to 400°F. Use a tin pan under the grill grate to catch grease that cooks out of the pork.
Cut any excess fat off the Boston butt. Then generously salt and pepper all sides. Using a heat-deflecting plate for indirect heat, place the pork butt on the grill (fatty side up so the rendered fat will baste the pork). Cook with the lid on for 1 hour. Then reduce the temperature to 300°F and continue cooking for 2-3 hours or until a meat thermometer inserted in the thickest part registers 165°F.
At 165°F, remove the pork butt from the grill. In a slow cooker, use a fitted rack or ball up sheets of aluminum foil and place them in the bottom of the crock. Place the pork butt on the rack (or on aluminum foil) and cover it with the lid. The grid or foil will elevate the pork so it does not sit in any fat that cooks out.
Cook on high for 3-4 hours until the pork is fall-off-the-bone tender and the lean pork pulls easily away from any remaining fat.
Remove from the slow cooker and pull off all the meat, discarding any fat. Chop if desired and serve with barbecue sauce.
Notes
Quick and Easy Barbecue Sauce
There is a simple trick for making barbecue sauce quickly. Use a store-bought thick sweet sauce and a thin vinegar-based sauce. Mix the two sauces together in equal parts. For example, mix 1 cup of thick sauce with 1 cup of vinegar-based sauce. Stir and serve.
Using a Slow Cooker
This Boston butt can also be cooked entirely in the slow cooker, either with a rack or the aluminum foil method. Cook for 2 hours on high and then approximately 8-9 hours on low. It is done when a fork pulls the meat easily. It should be extremely tender. Always check the meat 2-3 hours before the end time to make sure it isn't overcooking and drying out.
Nutritional Information
Nutritional information does not include any barbecue sauce.