This video shows how to make chocolate financiers, which are characterized by their dark color. In particular, the key is to separate the egg whites from the yolks three days in advance, remove the chalaza, and let them rest in the refrigerator in a watery state. Combine the dry ingredients of cake flour, almond flour, cocoa powder, black cocoa powder, and baking powder, then mix in the watery egg whites and granulated sugar. Add the melted unsalted fermented butter, chocolate, honey, and rum to make the batter. After letting the batter rest in the refrigerator for one day, pour it into the molds and bake in a 170°C oven for 21 minutes. The finished financiers have a crispy exterior and a moist interior, and you can enjoy the elegant chocolate flavor with just the right amount of sweetness. To finish, dip them in melted chocolate and decorate with powdered sugar and cocoa powder.