Chocolate Madeleines

Ingredients:
1/3 cup (60g) all purpose flour
1/4 cup (20g) Dutch processed cocoa powder
2 large eggs
1/2 cup (125g) sugar
1/4 tsp salt
1 tsp vanilla extract
6 tbsp (90g) unsalted butter, melted and cooled
Confectioners' sugar for dusting

Instructions:

1. Preheat oven to 190C. Using a pastry brush, heavily brush a 12 standard madeleine pan with room temperature butter. Dust the pan with flour. Turn the pan upside down, tap it gently to discard the excess flour.
2. In a medium bowl sift together the flour and cocoa powder. Set aside.
3. In a bowl of a  stand mixer, combine the eggs, sugar and salt. Beat until light in color and fluffy (about 3 minutes).  Beat in the vanilla. Sprinkle the flour mixture and beat on low speed until combined. 
4. Using a rubber or silicone spatula, fold in half of the melted butter until just incorporated. Add the remaining butter and mix until well combined.
5. Spoon the batter into the prepared pan evenly.
6. Bake until the tops spring back when lightly touched, about 10-12 minutes.
7. Remove the pan from the oven, invert it over a wire rack and rap the pan on the rack to release the madeleines. Let cool for 10 minutes and dust the shell patterned sides with confectioners' sugar just before serving.