Low gluten flour:
Low-gluten flour is short for low flour, also called cake flour. Low-gluten flour refers to flour with water content 13.8% and coarse protein below 9.5%, which is usually used to make cakes, biscuits, pastries and pastries. The sponge cake is made of low-gluten flour. Because the low-gluten flour has no strength, the cake made of it is particularly soft, bulky and flat. Low-gluten flour is similar to cake flour and pastry flour in daily life, but in addition to low-gluten flour, cake flour also contains wheat starch and emulsifier.