1. In a mixer, whisk the sugar with the eggs, then pour in the milk.

2. Add the flour mixed with baking powder.

3. Pour in the melted butter and add the cocoa powder.

4. Butter and flour the madeleine mold.

5. Fill the molds with the dough and refrigerate for 6 hours.

Preheat the oven to 350°F.

6. Bake for 10 to 15 minutes, then let cool on a rack.

7. Melt the crushed dark chocolate in a double boiler and dip the madeleines into it until they are half-coated in the melted chocolate.

8. Let the excess chocolate drip off, then dip the edges into the melted chocolate.

9. Place the madeleines on a parchment paper, bare side up, to let the chocolate set.