Beat the butter with the sugar and vanilla until fluffy and pale. About 10 minutes.
Incorporate the eggs one at the time while mixing.
Add the milk and incorporate it.
SIft the dry ingredients directly into the mixing bowl
Fold the dry ingredents into the batter with a spatula.
Caver the batter and refregerate it between one hour and three days.
Preheat the Overn to 220C / 428F.
Brush the Madeleines baking tray with soft butter.
Fill the madeleines tray to the 3/4, about one table spoon.
Bake for 5 minutes in 220C / 428F.
Lower the heat to 200C /398F and bake for a further 4 to 5 minutes.