01 -
Whisk together all-purpose flour, granulated sugar, baking powder, salt, and lemon zest in a medium bowl until evenly mixed.
02 -
In a separate bowl, whisk eggs, lemon juice, and vanilla extract until combined; then fold into the dry mixture until smoothly integrated.
03 -
Gradually add melted butter into the batter, folding gently until the mixture is glossy and homogeneous.
04 -
Cover the bowl tightly and refrigerate for at least one hour to firm the batter and promote a pronounced hump during baking.
05 -
Preheat oven to 375°F and thoroughly grease and flour a madeleine pan, or use baking spray with flour; chill the pan in the freezer for 10 minutes before use.
06 -
Using a tablespoon scoop, portion batter into each cavity of the chilled pan and bake for 7-8 minutes until edges are golden and cakes spring back when touched lightly.
07 -
Immediately invert the pan onto a kitchen towel, pattern-side down, and allow cookies to cool for 10-15 minutes before glazing to avoid cooking residual heat.
08 -
Stir powdered sugar, lemon juice, and water together until smooth while the madeleines bake.
09 -
Dip the pattern side of each warm but not hot cookie into the glaze, then place on a wire rack pattern-side up until the glaze dries completely.