Adapted from
The Sweet Life In Paris by David Lebovitz
If you use baking powder, they may take another minute or so to bake since the batter will rise higher. They’re done when the cakes feel just set if you poke them with your finger. Avoid overbaking them. There’s nothing better than a fresh, buttery madeleine.
I also prefer to bake these in the upper-third of my oven, so the tops get slightly-browned. I love the lemon glaze, but you can omit it if you want your madeleines nekkid.
Storage: Glazed madeleines are best left uncovered, or not tightly-wrapped; they’re best eaten the day they’re made. They can be kept in a container for up to three days after baking, if necessary. I don’t recommend freezing them since the glaze will melt.