Heat oven to 400°F. Whisk together eggs, milk, flour, sugar and salt in large bowl.Advertisement
Melt butter in oven-proof skillet, preferably 10-inch cast-iron pan, over medium heat. Using a pot holder, remove skillet from heat. Pour egg mixture into hot skillet.
Carefully transfer hot skillet to 400°F oven and bake for 20 minutes or until pancake is golden and puffed.
Sift confectioners' sugar over top of pancake and serve immediately.