This is not for the faint of heart...first two ingredients - butter and whiskey. Let me re-phrase that -
THE FIRST TWO INGREDIENTS ARE BUTTER AND WHISKEY!
Indeed. I started with this recipe (photos also stolen, since the time change has screwed with my photograph taking sessions recently). Highly modified, but started none the less. I also used Maker's Mark instead. Cheaper, bourbon-y-ier (yes, a word.), and so good.