List of ingredients...
Preheat oven to 190C fan-forced. Position the oven rack in the bottom third of the oven.
Using a small amount of the extra butter, smear the ramekins with the butter properly. Coat the inside buttered surface of the ramekins with the extra sugar (see Notes).
In a small bowl, add the flour, butter (diced into cubes) and salt.
Using your hands, rub in the butter into the flour and combine until there is no dry flour.
Separate eggs with yolks in small bowl and egg whites into medium bowl.
In a small pot, combine milk and 70 g sugar and bring to a boil on medium heat. Careful not to burn!
Add the flour and butter mixture to the pot with the hot milk and whisk until dissolved.
Cook for a further 3-4 minutes on low heat, lightly whisking, until the mixture has a thick texture.
Add the dark chocolate to the pot with milk/flour mixture and stir until it has melted and is well incorporated.
Add the egg yolks to the pot with milk/flour/chocolate mixture and whisk until well incorporated. Transfer to large bowl. Cover with cling wrap to stop skin from forming.
Beat egg whites on medium speed until a light foam is formed.
Add 20 g of sugar to the egg white foam.
Continue beating egg whites on medium speed until soft peaks form and it's firm and glossy (see Notes).
Add a third of the egg whites to the chocolate mixture and fold through lightly until just combined (see Notes).
Add another third of the egg whites and repeat.
Add the final third of the egg whites and repeat.
It should be just combined and still airy.
Carefully fill ramekins to the very top (see Notes).
Place the ramekins on a baking tray with baking sheet and bake for 17 minutes (see Notes).
Remove and eat within 5-10 minutes.