For the rub I used:
1/4 cup black pepper
1/4 cup chili powder
1 TBL dried oregano
1 TBL dried thyme
1 tsp cayenne
This is enough for an 8lb pork shoulder. Sprinkle all over pork and rub it in.
Next place some wood chunks in a foil pack- use two layers. Bundle up leaving a hole at the top so smoke can escape. Place the wood packet on the side of the grill with med-high heat. Next place a foil pan under unlit side for a drip pan. Then place the pork on the side with the drip pan.
Smoking takes 3 hours. Add more wood as needed. Rotate meat 3 times, but no more then three to reduce losing too much heat.
Next wrap the pork in two layers of foil, this is not standard, but help keep the meat moist and shortens cooking time. Cook until the pork reaches a temperature of 180 about 2 hours. Then let it rest for 30 minutes.
For the Rootbeer BBQ sauce:
Makes 3 1/2 cups
1 2-liter of rootbeer ( I used 3 12 oz bottles of birch and 1-liter of rootbeer)
Add and Simmer:
1 1/2 cups apple cider vinegar
1/2 cup ketchup ( I also used about 3/4 of a small can of tomato paste)
1/4 cup yellow mustard
2 TBL Lemon juice
1 TBL Tabasco
1 tsp salt
1 tsp black pepper
(I also added in a couple dashes of liquid smoke)
Finish with:
2 TBL Butter
In a large sauce pan reduce the soda to 1 cup (about an hour) on med. heat. Then add in the next 8 ingredients (or 10 if you add the 2 extras like I did) and simmer for 20 minutes. Finish with butter to give extra body and flavor.
My sauce looks more red then brown because I used birchbeer and tomato paste.