<p>I saw heavy cream on sale and bought two little cartons for making butter. Never did this before. You just keep stirring it past the whipped cream stage and it turns into a big lump of butter and buttermilk. Then you pour off the buttermilk and wash the butter in very cold water, until the water runs clear. I didn’t use the buttermilk, but maybe it would be good for baking. Real unsalted butter.</p>