In a blender, combine eggs, milk, flour, sugar, and vanilla. Mix just until all ingredients are incorporated. Let the batter rest as you preheat the oven and heat up the skillet.

Place a cold, 9-inch oven-safe skillet into the oven. Preheat the oven, with the skillet, to 425°F.

Once the oven is preheated, carefully remove the hot skillet from the oven and add butter.

After the butter has melted, pour the batter into the skillet and place it back into the oven to bake for 20 minutes.

Serve warm, dusted with confectioners' sugar.

Optional toppings: syrup, fresh fruit, cinnamon, sugar, peanut butter, jams, etc.