Take 600 ml thickened cream (aka whipping cream) in a mixing bowl
Keep the hand mixer on low speed, start to beat
Gradually increase the speed to high, beat it for 10 minutes, first the cream will get thick, and then stiff peaks will be formed in 10 minutes
After 10 minutes, reduce the speed to low, continue to beat, the mixture starts forming grainy and releases buttermilk. Keep beating for 5 minutes. Butter and buttermilk will be separated.
Collect the buttermilk and put it in the ice-cold water. Just rinse for while and take. (ice cold appeared as cloudy water after rinsing the butter, discard this water)
We can use buttermilk by filtering it
Keep the butter in refrigerator and use
