Step 1

Pat the pork roast dry and season with salt and pepper.

Step 2

Arrange the diced onion and garlic on the bottom of the crock pot.

Step 3

Season the pork with salt and pepper. Place in the crock pot.

Step 4

Whisk the water, cider vinegar, Worcestershire sauce, and mustard powder, ancho chili powder, and smoked paprika in a bowl together.

Step 5

Pour over the pork.

Step 6

Cover with lid and allow to cook on low for 8 to 10 hours, until the pork easily pulls apart.

Step 7

Remove any fat from the pork pull apart with 2 forks.

Step 8

Toss with barbecue sauce and allow to thicken for about 30 minutes before serving on fresh buns with desired toppings.