Mix 1/2 c of the nuts and the coffee into the dark chocolate. Pour the dark chocolate between the white stripes. Now take a knife with a sharp point and draw the tip over the chocolate stripes to ...

255 grams (9 ounces; 1 cup plus 2 tablespoons) unsalted butter, room temperature 398 grams (14 ounces; 2 ¾ cups) all-purpose flour 1 tablespoon instant espresso powder ...