1. Sterilize porcelain cups and spoons with boiling water.
2. Pour the milk into the cup until it is about 7 minutes full, and heat the milk in the microwave oven so as not to burn the cup wall.
3. Add yogurt to warm milk, stir well with a spoon and cover it.
4. Boil hot water to heat the rice cooker, pour out the hot water, put the porcelain cup into the rice cooker, cover the lid of the rice cooker with a clean towel or other heat preservation items, and ferment with the waste heat in the pot.
After 5.8 ~ 10 hour, the yogurt is ready. If it is cooked at night, you can drink delicious yogurt the next morning.