used a 5 cm / 2-inch diameter round cookie cutter • instant coffee (1.5 Tbsp coffee granules or 1 Tbsp coffee powder) • boiling water • unsalted butter, well-chilled, diced • bread flour • cake flour • cane sugar • salt • mixed nuts, roasted, unsalted, chopped roughly • Bread flour and cake flour can be replaced with 150g (5.3 oz) all-purpose flour • ℃ / 338 F for 21 minutes • Preheating; 190℃ / 374 F