To elevate the pork medallions recipe, it gets pan fried in a mixture of both butter and olive oil. If you’ve never added butter to your pan frying, you will never go back!  The butter adds the undeniably scrumptious, decadent buttery flavor and the oil prevents the butter from burning.  You may use all oil but you cannot use all butter or the butter will burn.  I recommend using both for best results.  If you want to use a different oil, make sure it has a high smoking point and neutral flavor.