Sieve the flour, sugar and salt together into a mixing bowl.
In a small bowl or jug, lightly beat the eggs. Add the milk and water to the eggs and mix together well.
Slowly whisk the egg mixture into the flour mixture to create a smooth batter.
Add in the butter and stir it into the batter.
Cover your batter and keep it in the fridge for an hour before using. This helps relax the gluten in the batter. This is an important step, don't skip it.
Preheat your preferred crepe pan to a medium heat.
Add a small knob of butter to the pan and swirl it around to cover the base of the pan.
Pour in ½ of a cup of crêpe batter into the pan and quickly tilt the pan in a circular motion to spread the batter evenly across the surface of the pan.
Allow the crêpe to cook for one to two minutes on one side, or until the batter on the surface looks set. Flip the crêpe and cook for a further minute.
Remove the crêpe from the pan and set aside on a plate.
Repeat the crêpe cooking process until all the batter has been used.