You can make yoghurt using fresh milk for a fraction of the price of yoghurt powder. Put fresh milk into your yoghurt maker, and add 3 tablespoons of yoghurt powder. You will have to change the water after about 8 hours with hot water from the tap (not boiling) and leave a few more hours. The yoghurt will have a different consistency than if you made it with powder and water, but it will still be yummy. Using this method, a sachet of yoghurt powder will last for about 5 litres of yoghurt. You must make sure that the yoghurt container and spoon are perfectly clean to start with.