Melt butter, and allow to cool slightly while prepping the other ingredients.
Add milk, egg, sugar, flour, melted butter, and salt to a blender or food processor.
Blend until smooth, with no lumps remaining.
Allow batter to rest for at least 5 minutes - you can start heating the pan on medium while waiting.
Melt additional butter on the pan and swirl it around, making sure it's fully coated.
Add as much batter to the pan as needed to fully cover it in a thin layer - you can swirl the pan around to spread the batter or smooth it with the back of a ladle or spoon. This amount will vary based on the size of your pan.
Cook until lightly browned. You can check if it is ready by lifting the edges with a spatula. It will not release from the pan until it is cooked.
Flip the crepe, cooking the second side until golden brown. Remove from the pan and set aside.
Repeat with remaining batter.
Fill the crepes with your favourite fruits and spreads, top with whipped cream (optional, but delicious), and enjoy!