Mix flour and salt in a baking bowl, add half of the milk and whisk briefly until smooth, then stir in remaining eggs, powdered sugar, milk and butter.
The dough should have the consistency of coffee cream. If it is too viscous, add a little more milk. Cover and let stand for half an hour. To bake the crêpes, heat a little oil in a frying pan.
To bake the crêpes: pour in just enough of the batter to thinly coat the bottom of the pan while rotating the skillet. Reduce temperature. Turn crêpe to the other side when the bottom is baked enough to release easily.
Bake just briefly and slide onto a plate. Cover and keep warm, perhaps in a slightly heated oven.