I made butter a couple of times, years ago when me and the ex were running our own small dairy farm, milking Jersey cows! We made our own ice cream too! Using cream that we skimmed off the top of the bulk tank...the first time I tried making butter, it didn't work. I was told by someone that I needed to actually let the cream set that I'd skimmed, and skim it again, and let it 'age' for a few days - what I was using was too fresh. Worked a treat, but making homemade ice cream was easier...