Add eggs, flour, milk, sugar, vanilla and salt to a blender and puree until smooth (you can also use a food processor, immersion blender or whisk until smooth).
Set the batter aside. Place a 9" or 10" skillet (or pie plate) in the oven and preheat to 425 degrees F.
When the oven is hot, remove the pan (be careful, it will be hot!) and add the butter, swirling to melt.
Pour the batter into the pan and immediately place back into the oven.
Bake for 15-18 minutes until puffed at the edges and golden.
Serve as desired.
Notes
*Nutrition information is per half of the dutch baby.