Peel the banana and sweet potato, then mash them finely.
In a bowl, mix the eggs, mashed banana, sweet potato, almond flour, and baking powder.
Melt the dark chocolate using a double boiler, add it to the batter, and mix well.
Divide the batter into a madeleine mold.
Bake in a preheated oven at 180°C for 15 minutes, then let cool.