Season the oxtails with 2 tsp kosher salt and 1 tsp black pepper.
2 tsp kosher salt, 1 tsp freshly cracked or ground black pepper, 2 1/2 pounds beef oxtails
Drizzle the Worcestershire sauce all over the oxtails, then toss the oxtails to make sure that they are coated.
2 tbsp worcestershire sauce
Next, sprinkle 1/4 cup of flour all over the oxtails and make sure that the oxtails are coated with the flour.
1/4 cup all-purpose flour
Next, pour the vegetable oil into a large pan and place the pan over medium heat.
3/4 cup vegetable oil
Once the oil is nice and hot, add the oxtails to the pan and brown them on every side.
Once the oxtails are nice and brown, remove them from the pan and put them in the slow cooker.
Return back to the pan with the hot oil. If they are burnt pieces in the pan, pour out the oil, strain, clean the pan, then pour the strained oil back into the pan.