1. Place the butter in a small, deep saucepan over low heat. As the butter melts, three layers will develop: a bottom layer of milk solids; a middle layer of clear, yellow butter; and a top layer of milky foam. Allow butter to gently simmer for 10 minutes to completely separate the layers. Remove from heat, and let stand for 10 minutes, to allow the foam to solidify at bit. With a spoon, carefully skim off the foam that rises to the surface, and discard. Carefully pour the clear, yellow butter off the milk solids at the bottom of the saucepan, and into a glass jar. Discard the milk solids.