mineral water (e.g., sparkling) for thinning the batter
Preparation
In a bowl, add flour, salt, eggs, and milk and mix until smooth. Add melted fat and mix again. Cover with a cloth and set aside for at least 30 minutes (you can prepare it even a day ahead and leave it in the refrigerator covered).
Fry pancakes on a well-heated pan. The batter should spread freely on it; if it's too thick, thin it with water. Fry until golden, flip to the other side and repeat frying.