Clarified butter — also known as drawn butter or ghee — can keep at shelf temperature for several months (providing you get all of the butter fat out). Use this as a dip for your crab legs or lobster, or use it for sauteing foods over high heat — such as my Hawaiian garlic shrimp.
In a frying pan, slowly melt the butter down until it's completely melted. Keep a close watch, as it could burn.
When the butter is melted, begin to skim off the white impurities from the surface of the melted butter, or strain through a cheesecloth.
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Notes
This will keep about 8 weeks in the refrigerator. If you want to keep it at room temperature, be sure to remove every bit of butter fat through a cheese cloth and store it in a tightly sealed glass jar. You can also freeze it for future use.