Preheat oven to 425 degrees. Place an 8x8 baking dish inside with the butter; remove once the butter is melted.
In a medium bowl, whisk together the flour, milk, eggs, sugar, vanilla, and salt until most of the lumps are gone.
Make sure the butter has coated the bottom of the baking dish, then pour in the pancake mixture.
Bake for about 20 minutes, or until golden brown and fluffy.
Add toppings like powdered sugar, maple syrup, and fresh fruit when ready to serve.