Golly. I pour one litre UHT full cream milk into my yogurt maker, stir in some skim powdered milk, scatter a few grains of culture over the top, leave them to hydrate for a moment or two, whisk them in, put the lid on, turn the timer to 10 hours and leave it. Usually overnight. Put it in the fridge in the makers container until its cold. Eat for breakfast with a banana. Perfect.