The main materials for Precious Cakes are crops, sugars and oil seasoned with some edibles of certain pharmaceutical functions.

The Precious Cake made by Suzhou Rice Fragrance Shop employs a folk recipe and compounds with food and such medicines as Chinese yam, hyacinth bean, codonopsis pilosula, etc., which could whet the appetite, prevent diseases and protect health. The Precious Cake could serve as dietetic-therapy food, and thus was granted the title of Jiangsu Famed Food.