The mother paste is made of millet and soybean through strict selection and grinding. Beans should be washed and soaked thoroughly, and soaking beans is also a science. After soaking, the mother paste made is tasteless; The foam is light, and the thickness of the ground soybean powder is uneven. The washed millet can't have bran, so as not to make the porridge bitter. The soaked millet and soybean are ground with a stone mill respectively. Then add water to the reed for precipitation, filter out the clear pulp on it, and repeat this for several times until the flour pulp juice is clean.

"Mother paste" is one of the unique specialties in Luyi County, Henan Province. Locally known as "mother paste". After drinking the bowl, it is as clean as washing, and it is the top grade. If it is not clean, there must be corn mixed in, which tastes bad. White as milk, delicate without residue, smooth as fat, sweet and refreshing, regardless of milk, hence the name mother paste. Serve with salted soybeans.