Getting your skillet nice and hot helps, so make sure to preheat it before adding anything to the pan. You want the temp to be about medium high. Melt butter or olive oil in the skillet until it begins to sizzle. Add your frozen hashbrowns to the pan and cook for about 5 minutes until the bottom of the hashbrowns is golden in color and then flip. Cook the other side for another 5 minutes and remove from heat.