Place a 10-inch cast-iron skillet in the oven and preheat to 425°F (220°C).

Add the eggs, milk, flour, salt, and vanilla to your blender and process until the mixture transforms into a silky, pourable consistency

When the oven is hot, carefully remove the skillet and add butter, swirling to coat the bottom and sides as it melts.

Pour the batter into the hot, buttered skillet and immediately return it to the oven.

Let the magic happen for 20 minutes in the hot oven, watching as the batter climbs up the sides of the pan and takes on a beautiful golden hue.

Serve immediately with your choice of toppings.