Brown the butter: Cut your butter evenly into cubes and line them on the bottom of a medium saucepan. Over medium heat, melt the butter. Allow it to bubble and foam for about five minutes, stirring occasionally with a spatula to keep the heat evenly distributed and to keep the milk solids from sticking to the bottom of the pan. After five minutes, remove the pan from the heat and swirl for 15 seconds. It should start to smell a bit nutty and the color of the butter will be noticeably darker. Pour the butter into a small bowl or ramekin and stick in the freezer for ten minutes to keep it from browning any further.