Put the milk on the fire until it is abou to boil. It is preferable to perform the water bath method using two containers of the same size
Bring another bowl and put cold water in it
Put a bowl of hot milk inside the bowl of cold water
Bring a small bowl; then put two teaspoons of free-range yogurt in it
Stir very well, then add it to the chilled milk and stir well
Add a tablespoon of powdered milk. You will help firming the consistency of the yogurt
Mix the mixture very well. Then pour the yogurt mixture into cups made for yogurt
Stack the cups on an aluminum raised tray
Boil a part of water and pour the boiling water in the tray around the cups
Cover each cup with a cover. Through this, you will prevent condensed water from falling from hot water
Cover the tray with a clean towel
Replace the previous step with running the oven for only five minutes. Turning it off and putting cups inside it
Leave the tray inside the cups for a period of 6 to 7 hours
Put the yogurt in the refrigerator until the time of serving
Enjoy your yogurt!