Making Butter

I tried making butter today because I had two quarts of milk from The Farm that were each almost half cream - one of the cows had a calf last month so her milk is super rich and creamy - and I couldn't resist the temptation of trying to make my own butter. I didn't use quite the 'proper' tools so it took a long time (45 min) and I stopped while it was still just buttermilk because I was tired of shaking the jar. I now am freezing the 2 cups of buttermilk for future cooking and next week I will try again using these instructions: Cooking For Engineers - Kitchen Notes: Making Butter