unsweetened chocolate bar (me: extra dark chocolate 72% cocoa), potong kotak • butter (me: unsalted + 1/4 sdt salt), potong kotak • granulated sugar • light brown sugar • large eggs, room temperature • vanilla essence, atau bisa juga 1 tsp vanilla + 1 tsp coffee powder • plain flour • unsweetened cocoa powder, baca tips saya di kolom cerita • pecan / almond / cashew, roasted with 1 tbsp butter until golden • almond slices untuk topping