I made butter for the first time last night. I was amazed how easy it was.
Added about 12 ounces of whole cream to the minibowl of a KitchenAid 7 cup food processor and ran it for about 8 minutes. The cream turns to whipped cream and then separates into solid and liquid. You can hear the changes happening along the way as the pitch of the motor changes.
When it was done there was a mass of butter and a pale white liquid. I washed off the liquid under cold water tap water. Then I pressed out the water with my hands because the Internet told me that helps keep the butter from going rancid.
The butter was fairly bland, so I pressed a little salt into the butter and we ate that on hot bread. Big smiles all around.
You can do the same thing with a KitchenAid stand mixer with the whisk attachment. It supposedly gets pretty messy when the butter starts separating from the whey – I saw that happening inside the food processor with the whey spraying everywhere. Some people cover the top of the mixing bowl with Saran Wrap. The food processor sounded easier.