Homemade butter???

I saw this on a website. It looks like a neat idea. I would expect you could put some herbs or garlic in the butter too for an added taste. There are a lot of combinations I could think of.

Ingredients:
2c heavy whipping cream
salt to taste (a pinch of kosher salt)

Pour the cream into a food processor. Blend for 6-10 minutes until the cream forms into a ball. Remove the solids from the liquid. Squeeze out the excess liquid and pat butter into a dish.
(The first four minutes, it comes together looking like thick whipped cream. Then within a minute of two, it starts to curdle and the liquid separates almost immediately. Another minute or two later, you have a nice round ball of butter.)