REPORT: MAKING YOGHURT

Milk goes bad quicky, but we can preserve it by making yoghurt. We use a process called fermentation to make it. In this process bacteria change the carbohydrates in the milk into acid. The acid stops other micro-organisms growing in the food.

1. We needed a vacuum flask, some fresh milk, a pot of natural yoghurt, a gas hob, a pan, a wooden spoon and a bowl for the finished yoghurt.

2. We poured the milk into the pan and we let it heat to 30ºC. We stirred the milk and we didn't let it get too hot!

3. We let the milk cool a little. Then we added the natural yoghurt.

We stirred the mixture for about two minutes.

 

4. We put the mixture into a vacuum flask and we closed the lid.

 

 

5. We waited for twelve hours.





6. We opened the flask and we poured the yoghurt into a bowl.

 

7. We kept the yoghurt in the fridge.