German Pancake (Dutch Baby Pancake)

0 Preheat the oven to 400ºF. Turn this on early so that it can heat up properly or your pancake might not rise as well.
1 Add the eggs, milk, flour, sugar, salt and cinnamon to the blender. Blend for a minute. Scrape down the sides with a rubber spatula.
2 Warm a cast iron skillet over medium-high heat. Add the butter, and let it melt.
3 Brush the melted butter up the sides of the skillet with a pastry brush, as well as around the bottom. This will prevent the pancake from sticking, so make sure to spread it evenly.
4 Pour the batter into the hot skillet, and immediately transfer to the preheated oven.
5 Bake for 15-18 minutes, or until the pancake has risen and is golden brown.
6 Enjoy immediately with your favorite toppings!