I've made whipped cream and butter with a fork and a whisk. The fastest way is to heat the container a little. Believe be when I tell you making whipped cream with a fork takes a while. You'd better like sweat-flavored whipped cream. Cuz that's an ingredient.
If you heat the container, it goes:
If you put the container in the refrigerator for a bit, before doing the same process, you get whipped cream, at the end.