On a plate or in a shallow bowl, whisk the flour with the dry mustard and paprika. Dredge the pork chops with the flour. Reserve the flour to use when making the gravy.
Set a large skillet over medium heat. Add the oil and heat. Add the pork chops and cook for 4 minutes on each side. Remove the pork chops and set aside.
2 tablespoons vegetable oil
Turn down the heat on the skillet. Melt the butter in the skillet. Add in the onion and garlic, season with salt and pepper, and sauté for about 3 minutes. Add in the mushrooms and cook until tender, about 3 minutes.
2 tablespoons unsalted butter, 1/2 small yellow onion, 2 cloves garlic, 1/2 teaspoon kosher salt, dash ground black pepper, 8 ounces white button mushrooms
Add the flour to the pan and toss the mushrooms in it. Slowly add in the beef stock, scraping up the browned bits from the bottom of the pan as you slowly whisk it into the skillet. Stir in Worcestershire sauce. Turn up the heat. Bring to a simmer, bring the heat back down, and cook for 10 minutes, stirring occasionally.
Add the pork chops (plus any liquid that has accumulated on the plate) and cook for 5 more minutes, or until the pork reaches an internal temperature of 145 degrees Fahrenheit and the gravy has thickened.
Serve the pork chops with the gravy and garnish with parsley if desired.
Video
Notes
Look for thick-cut pork chops that are at least 1-inch thick. Thinner cut chops are going to require less cooking time and you will definitely want to use an instant read thermometer to ensure the pork does not get over cooked.