Authentic white sugar cake: raw materials: sticky rice flour 350g, clarified flour 1 00g, four cups of clear water, half an egg white, 600g of sugar. Cake species: half a cup of warm water, two teaspoons of dry yeast, half a teaspoon of sugar, half a cup of sticky rice flour. Preparation:1,soak dry yeast and sugar in warm water until they are dissolved, add half a cup of sticky rice flour and mix well. 2. Mix sticky rice flour and clarified flour with two cups of clear water, let stand until the clear water and wet flour are separated, and filter off the upper water. 3. Add two cups of white sugar and water to boil and dissolve, add the protein and mix well, filter, pour a small amount into the powder and mix well, and cover it for several hours. 4. Mix the cake seeds and rub them for several times, cover the pan with turbid cloth, and let it stand for 12 hours until it is bubbly. 5. Put the white syrup into a steamer with steamed cakes, and steam it for 25 minutes over a big fire. 6, pour out a little cold for a while, cut into pieces.