I'm sure many of you have looked into and tried making yoghurt at home and have decided it's too much of a faf. Well I've played around with scalding pans and spoons and timers etc and have now come up with my definitive method of making wonderful yoghurt in a decent quantity.
The main secret is how to boil milk without burning it...Easy...always boil it in a pan or pot that is pottery, porcelain, or glass. I once left a pot on the stove and took the dogs for a walk for an hour and it was boiling happily away but was not burnt and had not boiled over.
So here we go.
Make sure everything is scrupulously clean. If you want pour boiling water over all tools. I personally don't bother.
Pour your chosen milk into the pot pretty much full. No need to measure quantities. (I have an Aga so I'll do it for that). Place on the slow ring or a low heat and gently bring to the boil, it may take quite a long time but as you are heating it in a 'pot' rather than a metal pan don't worry, go and peg out the washing etc. When it has come to a gentle simmer or there are lots of tinny bubbles around the edges remove from the heat.
Whisk in 4 heaped tablespoons of dried milk powder. I use Marvel. Make sure it has mixed in well. Cover and leave to cool. When you can put a very clean little finger in the milk and it feels warm but not hot, say 5 seconds of a finger in there without it hurting plop your small pot of live yoghurt from the super market in and whisk it to distribute.
I now place it (covered with cling film) at the back right hand side of the Aga sitting on a cloth with a wooly hat over it for about 4 hours, If you don't have an Aga use a heat pad for kittens, a radiator or the airing cupboard, or if you have a floor standing boiler on there. You may have to adjust your timing a little (probably longer as the back of an Aga is quite hot) depending on your chosen heat source. If you forget about it don't worry it can stay there for 6 or 8 hours and come to no harm. Do not disturb it during this time. Have a look and voila you have yoghurt. Use this as you please and keep a tablespoon full or two for your next batch. Firm and creamy, not sharp at all. Wonderful with fresh fruit, muesli, sauces, salad dressings etc. I eat it each morning.
You may find that it separates and there is a yellow liquid (whey), not to worry this is really good for you but if you don't like it give it to your dog, the hens or just pour away.
Enjoy.