(use a cooking tray, 33 x 25 x height 5 cm, 13 x 10 x height 2 inches) • (I used KitchenAid Artisan 3.3L to knead the dough) • bread flour • cake flour or pastry flour • raw sugar • nonfat dry milk • (1 and 2/3 tsp) instant dry yeast • salt • egg yolk • lukewarm water, 40 ℃, 104 F • unsalted butter, room temperature