Raw pulp and cooked pulp fermentation. The colorful coconut juice of water chestnut cake is bitter because of the fermentation of raw and cooked pulp. Colorful coconut milk horseshoe cake is rich in folic acid, vitamin E, dietary fiber and other nutrients. Coconut is rich in carbohydrates, dietary fiber, vitamins and minerals such as potassium, phosphorus and magnesium. Proper consumption of water chestnut and coconut is helpful to supplement the nutrition and energy needed by the human body.