This comes from the Joy of Cooking.
The process has some extra steps (hand beating the butter, sifting the flour, and careful folding of ingredients) but the results are excellent. They rise nicely, have a crisp outer layer with an airy but chewy inner texture.
Watch carefully as they burn quickly. You can add the zest of one lemon for an elegant twist.
A real Madeleine pan is a must. These treats make impressive hostess gifts, and are wonderful with a bold black tea.
Viva la France!