You sure can! All you need to do when it’s time to add the batter to the pan is instead of pouring all the chocolate batter into the pan at once, only add half. Then add the goat cheese mixture, then add the other half of the chocolate batter on top in large scoops. Then use a butter knife or long wooden skewer and swirl it around in the pan to create the marbling and bake at the same temperature for the same amount of time.