For several years I made yoghurt using a thermos and commercial yoghurt packets. Then I started using powdered milk instead, which was cheaper and just as easy. And then we got Bella our house cow, so I started using real milk, not as easy, but more nutritious and just as tasty. Bella won’t give us milk all year, so when she is dry I think I will use organic milk or maybe milk powder again. This is a summary of what I’ve learnt from all my yoghurt experiments to far.