Preheat the oven to 400F. Place a cast-iron skillet or 9X13 inch baking dish inside while it heats.
Prepare the batter: In a blender, bowl or Thermomix bowl, whisk together eggs, milk, flour, sugar, and vanilla extract until smooth. If your using a Thermomix I mixed it for 1 min/speed 4.
Melt the butter: Carefully remove the hot skillet or baking pan and add 2 Tbsp of butter, swirling until melted and bubbling.
Pour the batter: into the hot skillet/baking pan.
Bake: for 20 minutes, or until puffed and golden brown around the edges.
Serve immediately: It will deflate slightly, which is completely normal. Dust pancake with icing sugar and serve with different kinds of berries, such as raspberries, strawberries, and blueberries. Along crispy bacon for a sweet savory combination. Enjoy!