Preheat your oven at 165°C (330F). In a double boiler or in the microwave, melt chocolate with butter. If you do it in the microwave, do it in 30‑second intervals and mix in between to make sure you don't burn it. Start with that because you want your chocolate to cool down a bit before mixing with your eggs. In a separate bowl, whisk together eggs and brown sugar. Add both regular and almond flours, sifted. Finally, add chocolate and butter mixture into the eggs mixture. Immediately pour into a loaf pan 21cmx11cmx7cm high (8"x4 1/2"x 2 3/4" high) coated with butter and flour (or use a baking spray) to make sure it does not stick to the pan.
Baking
Bake for 25‑30 minutes at 165°C (330°F). Remove from the mould and let it cool down for at least 30 minutes. To make sure that your cake is ready, poke a knife in the center: it should come off with some of the batter sticking to it but it should not be liquid.
Notes
You can find the recipe in video here. Share the results on social media and tag my profile. Even though it is really tempting, make sure not to cut it right away! Let it cool down for at least 30 min before you enjoy!Pay attention to the size of your cake pan. Don't hesitate to change the quantities according to your pan.