Madeleines

A friend of mine is the pastry chef at Madeleine's restaurant in Pasadena (I can't figure out how she can stay so skinny) and she makes the best Madeleine cookies ever. I have tried so many recipes for these, trying to duplicate the ones they make in Paris and have never found one that was even close.  They are very hard to make, and of course you have to have a special pan.  My children loved these cookies growing up, and called them seashell cookies. Her's are pretty good, but you don't ask a pastry chef for a recipe.  If anyone has a good one, please let me know.