Preheat your oven to 425°F (220°C).
In a mixing bowl, whisk together the eggs, milk, flour, sugar, vanilla extract, and salt until smooth.
Melt the butter in a cast-iron skillet over medium heat.
Once melted, pour the batter into the skillet, swirling to coat the bottom.
Transfer the skillet to the preheated oven.
Bake for 15-20 minutes until puffed and golden brown.
Remove from the oven and let it cool slightly.
Dust with powdered sugar and top with fresh berries.
Cut into wedges and serve immediately with maple syrup.
Enjoy this fluffy treat with your favorite toppings!