Make plain yogurt with me usually yogurt. The idea here is to use a small amount of yogurt to get a big batch,and soon enough you can stop buying yogurt and reuse the leftovers to make another batch. I used: -2 litres of milk -4 TBS Greek yogurt . Method: -in a pot simmer the milk until it reaches boiling point. -let it cool down to 44degrees or until it’s safe to touch when you deep your finger in, -add a cup of the cool milk to 4tbs of yogurt and whisk before adding it to the rest of the milk.