※ use a 5 cm / 2 inches cookie cutter • (3.4 oz, 10.5 Tbsp) cake flour, pastry flour • (1.9 oz, 6 Tbsp) bread flour • (1 + 1/4 tsp) baking powder • unsalted butter, well-chilled • (1.2 oz, 2.5 Tbsp) beaten egg, well-chilled • (1.4 oz, 2 + 2/3 Tbsp) milk, well-chilled • (1 oz, 2.5 Tbsp) granulated sugar • salt • egg wash for brushing