ingredients 所需食材： 65 unsalted butter 無鹽黃油 35 g icing sugar 糖粉 1 egg yolk 蛋黃 115 g cake flour 低筋麵粉 10 g cocoa powder 可可粉 40 g sliced almonds 杏仁片 15 g chocolate chips 巧克力豆 Preheat the oven to 320°F/160°C in advance, and bake at the middle rack for about 20-22 minutes. 提前預熱烤箱至160度，放中層烘烤20-22分鐘。