How to make a strawberry Swiss roll?草莓瑞士卷制作详解 材料recipe 装饰材料decoration material 蛋白egg white 25 g 面粉 cake flour 25g 糖sugar 25g 无盐黄油unsalted butter 25g 食物颜料 food color 牙签 toothpick 蛋糕体制作材料 cake body making materials 牛奶 milk: 100ml 糖 sugar: 100g 面粉 cake flour: 120g 油 oil: 60 g 蛋黄 yolk: 4 kpl 蛋白 egg white. 5 kpl 内陷 inset 奶油 cream 200g 新鲜草莓 fresh strawberry 200g 170°C 12 minute