Place pork chops between two pieces of plastic wrap (or wax paper or in a resealable plastic bag). Seal bag and hit the pork chops with a meat mallet until 1/4 inch thick.
In one bowl beat egg. In a separate bowl combine flour and seasoning salt.
Remove pork chops from plastic bag, dip in egg and then dredge in flour to coat completely. Transfer to a plate and let set for 15 minutes.
In a skillet heat butter and olive oil over medium heat. Once butter has melted fry pork chops until browned and cooked through. About 3-4 minutes per side. Transfer to a ovenproof dish and place in oven to keep warm.
Reserve 1 tablespoon of the pan drippings. Add mushrooms and cook until browned, about 5 minutes. Sprinkle 2 tablespoons of flour over the top, stir. Cook for 1 minute. Whisk in broth and milk. Cook until thickened. Season to taste with salt and pepper.
Place cooked pork chops on a serving platter, spoon gravy over the top. Serve.