Combine the flour, milk, beaten eggs, and grated nutmeg in a bowl.
Using a hand mixer, beat until combined, making sure to leave the batter a little bit lumpy.
Melt the butter in an OVENPROOF skillet over medium heat. Once the butter has melted, pour the batter into the skillet and bake in the oven for 15-20 minutes, or until the pancake is golden brown.
Combine the brown sugar and cinnamon until mixed thoroughly.
Remove the German pancake from the oven, slather the top with some butter, then sprinkle with cinnamon and sugar mixture.
Slice the German pancake and serve immediately. Enjoy.