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.