A Rich tasty and creamy butter
Now whisk it on low to start. You can either use a machine whisk or a hand whisk. If you don't have a whisk you can put it into a container shake it but it does take a while.
Increase the speed of your whisk and continue to whisk your cream until it turns to butter. You may need to go back to slow again when the butter starts to form.
You should also have some buttermilk with the butter. Remove the buttermilk and store it as it can be used for lots of different things.
Cool that's it now you are ready to make whatever you want it for.
European butter is made from sour cream and American butter is made from double/heavy cream. The process is the same.