Biscotti cioccolato e pepe nero di Sarawak
all-purpose flour (about 200 grams) • unsweetened cocoa powder (about 130 grams) • unsalted butter, at room temperature (about 170 grams) • sugar, preferably brown sugar for a more rustic flavor (about 200 grams) • large egg • baking powder • freshly ground Sarawak black pepper • salt • chocolate chips, optional (about 50 grams)