Put butter in dark chocolate and melt at 104~122 degree Fahreheit and mix it

Add eggs, brown sugar and salt and double boiler untill sugar dissolved and whipping for 4 minutes at high speed

Put down the mixer to medium speed and pur melted chocolate and butter slowly

Sift pastry flour, Cocoa powder, baking powder and baking soda and mix it, After that pour dry ingredients into wet ingredients

After that scoop batter on a baking sheet

Bake in the oven at 355 degree Fahreheit for 10mins