Heat a sauce pan over medium heat and add the butter.
3 Tablespoons Butter
Once the butter has started to melt add the onion and cook, stirring occasionally until the onions are soft and translucent.
1/3 Cup Onion
Add the remaining ingredients and bring to a boil.
1/3 Cup Lemon Juice , 1/8 teaspoon Salt, 2 Tablespoons Brown Sugar, 1/2 Cup Water, 2 Tablespoons Mustard, 2 Tablespoons Worcestershire Sauce, 1 Cup Ketchup
Once the sauce reaches a boil turn to low and simmer for 10 minutes.
Remove from heat and allow to cool.
For the Pork
Fill the meat injector.
If the pork came tied up remove the paper or plastic but leave it tied with butcher string, otherwise just place it in the slow cooker.
1 Pork Shoulder/Butt about 3 pounds
Using the meat injector, inject the meat about 6-10 times all over with about 1 cup of BBQ sauce, leaving the remainder for the end.
1 Cup BBQ Sauce , Meat Injector
Cook on low for 6-8 hours (we always do 8 unless it is a very small piece of meat) or until so tender the meat is falling apart.
Serve immediately with reserved sauce.
Notes
A boneless pork shoulder or butt works best for this recipe. If you use bone in give it a little longer to cook or watch carefully and when it is falling off the bone it is done.Pulled pork will keep 3-4 days. Cover tightly and store in the refrigerator.