01 -
Preheat oven to 350°F. Line baking trays with parchment.
02 -
Whisk together flour, cocoa powder, baking powder, and salt.
03 -
Microwave chocolate and butter in 30-second intervals until smooth.
04 -
Beat eggs and brown sugar for 5 minutes until pale and tripled in volume.
05 -
Add melted chocolate and vanilla to eggs, then fold in dry ingredients.
06 -
Refrigerate batter for 15 minutes until thickened.
07 -
Scoop and bake one tray at a time for 10-12 minutes until tops are shiny and cracked.