"Madeleines au Chocolat Madeleines are good any time, any where. Here are some secrets to making madeleines, and a wonderful chocolate version which is guaranteed to please! ? Make the dough up to three days in advance and chill it in the refrigerator. ? Heavily butter the molds and chill them so the butter hardens before the molds are filled with batter. ? Refrigerate the filled molds before baking. ? Make sure the oven is fully hot before baking the madeleines. ? Bake for no longer than 7 minutes ? the madeleines should not quite spring back when you touch them. This ensures a moist result...."