紫薯心形馒头配方ingredients可做10个馒头(10 buns)中筋面粉 all purpose flour3cup (400g)速效酵母 instant Yeast: 1tsp (3g)紫薯 purple sweet potato: 230g牛奶 Milk1/2cup(125g)+1tbsp(15g)白糖 granulated sugar 2tbsp (25g)猪油 lard2tbsp (25g)