In a blender, combine eggs, milk, flour, sugar, and vanilla. Blend until smooth. Let the batter rest while preheating the oven and skillet.

Place a 9-inch oven-safe skillet in the oven and preheat to 425°F. Once preheated, carefully add melted butter to the skillet.

Pour the batter into the hot skillet and bake for 20 minutes until puffed and golden.

Remove from oven, dust with confectioners' sugar, and serve immediately.

Optional: top with fresh fruit, syrup, or other toppings as desired.