Step 1

Place onions in crock pot.

Step 2

Blend brown sugar, paprika, salt and pepper; rub over roast.

Step 3

Place roast in crock pot. Drizzle liquid smoke over roast.

Step 4

Combine vinegar, Worcestershire sauce, red pepper flakes, sugar, mustard, garlic and cayenne pepper and stir to mix well.

Step 5

Drizzle about ⅓ of mixture over roast. Cover and refrigerate remaining mixture.

Step 6

Cook roast on low for 8-10 hours.

Step 7

Remove meat and onions, discard onions and shred meat. Add juices from crock pot and remaining vinegar mixture (a portion may be reserved to pass).

Step 8

Serve plain or as sandwiches.