Instructions

1. In a medium size bowl, combine the flour, sugar, baking powder, and salt. Whisk well to blend the ingredients.
2. Whisk the eggs and vanilla together and stir into the flour mixture until well combined.
3. Pour the melted butter into the batter and fold until fully incorporated and shiny (To prevent adding too much air, do not mix the batter too vigorously).
4. Cover the bowl with plastic wrap and refrigerate for at least 2 hours or overnight to fully chill.

To Bake the Madeleines: 

1. Heat the oven to 375°F and grease and flour the madeleine pan.  Alternatively, you can use a baking oil/flour spray, brushing into the crevices. Place the pan in the freezer for 10 minutes to chill.
2. Using a tablespoon cookie scoop, place a level scoop of batter into each cavity of the chilled pan.  
3. Transfer the pan to the center rack of the oven and bake for 7-8 minutes, or until the edges look golden and crisp and the cakes spring back when lightly touched.
4. Remove from the oven and immediately flip them onto a kitchen towel for 10-15 minutes, then place on a wire rack, pattern side down to finish cooling.