Culture – you do need a plain yoghurt to start with.
Carton of Long life full cream milk
Sealed container

I warm the milk to start with, only because I use an ordinary container not a manufactured yoghurt maker. – So warm milk to finger temp.(when you dip your finger in it’s not hot but not cold either).
– Now whisk into the milk about one desert spoon of yoghurt.
– Pour into container, cover, leave somewhere warm.
That’s it, after a few hours you will have a pot of yoghurt.
If you flavour with fruit, just remember to keep some plain yoghurt for the next batch.