Delicious chocolate cake

1 Preheat the oven to 190°C;

2 Separate the egg yolks from the whites, setting the yolks aside;

3 Install the butterfly whisk in the mixing bowl and add the egg whites with a pinch of salt. Set for 5 minutes at speed 3. Set the whipped egg whites aside and remove the butterfly whisk;

4 Without washing the bowl, add the egg yolks and sugar and set for 3 minutes at speed 3 (without the butterfly whisk);

5 Add the butter and chocolate in small pieces and set for 6 minutes at 60°C, speed 2. Check that the chocolate is completely melted. If necessary, set for a few more minutes at the same speed and temperature;

6 Add the flour and mix for 20 seconds at speed 3;

7 Transfer the mixture to a bowl and gently fold in the whipped egg whites with a spatula;

8 Grease a loose-bottomed cake tin with butter, dust it with flour, and pour the mixture into the tin. Bake for 15 minutes.