01 -
Turn your oven on to 160ºC (320ºF) with fan running or 170ºC (338ºF) without. Get your baking tray ready with some parchment on top.
02 -
Put your butter and dark chocolate chunks together in a bowl that can handle heat. Set this over some simmering water, making sure the bowl stays above the water. Keep stirring now and then until everything's melted together smoothly. Add your vanilla and mix it in.
03 -
Grab another bowl and dump in your fine sugar, brown sugar, and eggs. Grab an electric mixer and whip them until they're super fluffy and thick.
04 -
In a separate bowl, put together your flour, cocoa, baking powder, salt, and chocolate chips. Give them a good sift to get rid of any lumps and mix everything evenly.
05 -
Slowly pour your melted chocolate and butter into the egg mixture. Don't stir too hard - you want to keep all that air in there.
06 -
Now gently fold your dry ingredients into your wet mix. Use a spatula and just mix until everything's combined. Don't overdo it or your batter will fall flat.
07 -
Drop spoonfuls of your batter onto your lined tray, leaving plenty of space between them. They'll spread out while baking. Stick them in the oven for about 12-14 minutes, until they look crackly on top.
08 -
Pull them out and if you want, sprinkle some sea salt on top right away. Let them sit on the hot tray for about 10 minutes, then move them to a rack to cool down completely.