How to make butter

Pour a pint of whipping cream, yogurt and ice cubes into a food processor jar. Blitz for 30 seconds at a time. You will need to churn until the butter is solidified on top and buttermilk at bottom. Once the butter has solidified remove the buttermilk and save it for drinking.

Scoop the butter into a sieve. Rinse the butter by pouring ice water over it and pressing the remaining buttermilk out with a spatula. Keep rinsing and squishing the butter with the ice water until the water runs clear. Then add some salt if you like and work that through the butter.