For the brownies:65 grams dark chocolate (approximately 1/3 cup chopped)60 grams butter (about 1/4 cup)1 level teaspoon cocoa powder1 large egg65 grams white sugar (about 1/3 cup)Ready for more? Melt the chocolate and butter together in the microwave using short pulses, or over a pot of hot water. This is precisely what will create the chocolate pockets inside the cookies later. Add the brown sugar, white sugar, egg, and vanilla, and beat until you have a thick, uniform mixture. Add the flour, baking powder, baking soda, and salt, mixing with a spatula just until almost combined.