Milk and bacterial powder should be taken out of the refrigerator in advance and returned to room temperature; The inner container of yogurt machine is fully scalded and disinfected with boiling water; Adding about 800~ 1000ml of pure milk; Add 1 acid-coated milk powder (1g) and stir gently; Ferment in a yogurt machine at constant temperature for 6- 10 hour until milk coagulation is observed. The prepared yogurt can be eaten immediately or refrigerated for several hours, with better flavor! When eating, you can also add sugar or other jam to taste according to your personal preference.