The Season. Season pork butt generously. My preference is salt and pepper, but you can use any rub you prefer.
Marinade the flavor... Place pork in a resealable plastic bag. Spread mustard evenly over butt while inside the bag to avoid mess. Seal bag and refrigerate overnight.
Preheat smoker to 225°F.
Smoke the butt... Place butt on middle rack of smoker and smoke for 7 to 8 hours or until "the stall."
Spritzen... butt every 30 minutes with apple cider vinegar.
The stall... When internal temperature reaches 165°F or so, there is a stall when the meat temperature does not increase.
The Wrap... Remove from smoker, cover with heavy-duty aluminum foil, and return to smoker. Some use paper and others use plastic wrap. I prefer heavy duty aluminum.
Increase smoker temperature to 275°F.
The finish... Smoke for an additional 2 hours or until internal temperature reaches 205°F.
The Rest... Rest meat inside foil and wrapped in towels inside a cooler for 2 hours.
The Pull... Pull pork with a fork and serve.