Make 1 litre of healthy fresh yoghurt with no artificial colours or flavours much cheaper than if you were to buy it in the supermarket use just put 2 dessert spoonfuls of natural yoghurt of the same fat content as the milk you want to use or 1 pinch of bacterial culture with 1 litre of milk and it will be ready in 11 to 12 hours homemade yoghurt can be used when you want to make the next batch 3 parts natural yoghurt 4 5 parts fermented can be kept in the fridge for 4 8 days features