Combine eggs, flour, milk, sugar and mix until smooth.
Place butter in a heavy 10-inch skillet or baking dish and place in the oven. As soon as the butter has melted (watch it so it does not burn) add the batter to the pan, return pan to the oven and bake for 20 minutes, until the pancake is puffed and golden. Lower oven temperature to 300 degrees and bake five minutes longer.
Remove from the oven and serve topped with lemon and powdered sugar.
