I have made butter before, but I used Jersey milk. I have Holstein milk now. Not as fat but the woman I got it from says she makes butter with it. She makes butter when it is a week old. I wasn't sure that I needed to wait a week since I never had before, so I asked an old dairy farmer friend of mine. She said if I wanted sweet cream butter, to use it now. If I wanted a tangier butter, to wait a week. I wanted sweet butter so I skimmed the cream and put it in my kitchenaid mixer. That cream went for 3 hours and only whipped. No fat granules at all. I finally gave up and put it in quart jars to keep for a week. Today, I tried again. First in the mixer, then the food processer. Still nothing. Am I missing something with Holstein cream?