The flavour is now vanilla and apricot :)
The result is just.... perfect madeleines :) I don't know if I prefer vanilla or lemon ones, but thy really are cute and really tasty.
I haven't used any baking powder
The dough has to be light.
I removed the lemon zest and added 1 big teaspoon of apricot marmelade after the flour,
and 1 tsp of vanilla extract with the butter.
The detailed recipe (with pictures) et enhanced (cooking time)