Place a 10-inch cast iron skillet inside oven and preheat oven to 475 degrees. In a medium bowl beat eggs with a whisk until light. Add milk and stir. Gradually whisk in flour, nutmeg and salt. Remove skillet from oven and reduce oven heat to 425 degrees. Melt butter in hot skillet so that inside of skillet is completely coated with butter. Pour all the batter in the skillet and return skillet to oven. Bake until puffed and lightly browned about 12 minutes. Remove promptly and sprinkle with powdered sugar.
This is unique and delicious. I make these all the time. Some people call them Dutches Babies, but I am from PA Dutch country and we never have called them that. My kids call them Puff Babies, because they puff up. You can also use a 9 inch greased pie pan in place of a skillet. They are so easy so good and you can top them with whatever you want. We like powdered sugar, syrup and fruit compote.