Preheat the oven to 425°. Mix the eggs, flour, milk, sugar, and nutmeg or cinnamon in a blender until smooth. I use a Nutribullet.
Place butter in a large skillet or baking dish and put it in the oven. As soon as the butter is completely melted (don't let it burn) swoosh it around so all sides are coated with butter too.
Add the batter to the pan and bake for 20 minutes or until the baked pancake is browned and golden.
Lower the temperature to 300° and bake for 5 minutes longer.
Remove the Dutch Baby from the coven, cut it like you would a pizza and top with syrup, confectioner's sugar, cinnamon, and sugar or Nutella.