You know how in the ad the meat glistens and looks all juicy? They paint it with wood varnish. The burger stands up with all the ingredients neatly spread out because there's cardboard spacers between them.
You wouldn't actually want to eat the burger in the ad. It isn't food.
Similarly, pancakes don't have syrup on them. They pour motor oil over them so it doesn't absorb and looks better in the picture. They put the cardboard under them, too, to make them fluff up better.