While you do need a special pan, I promise these Madeleines are worth it. Refreshing and light, serve them with tea.
Butter and flour a Madeleine pan. Set aside. Add lemon zest to sugar and stir. Place sugar, flour, baking powder and salt in a mixing bowl. Combine.
Add eggs and beat until mixture is smooth. With mixer running slowly add melted butter until smooth and creamy. Spoon batter into prepared pans. Cover with plastic wrap and refrigerate overnight.
Remove from refrigerator and bake in a 400 degree F (202C) oven until puffed and golden brown. About 12 - 15 minutes. Remove from oven and turn over pan to release the hot madeleines. Dust with confectioners sugar.
for high altitudes above 4500 feet add 1 tablespoon additional flour and 1 tablespoons additional sugar. Madeleines can be flavored with just about anything. Infuse herbs into the butter to flavor and strain before using to add additional flavor.