For compound butter: melt your butter in a microwave safe dish. After 30 seconds check the butter, it needs to reach a whipping consistency. Add the rosemary, beer, salt & pepper, and mix. Transfer the butter to plastic wrap and form the butter into a log. Wrap up and set in the refrigerator until solid (about an hour or so).
In a separate frying pan, cook your apple-wood smoke bacon on a medium-low heat until cooked through.
In a cast iron skillet melt a slice of your compound butter. Arrange two slices of cheese, two slices of bacon and another two slices of cheese in between your slices of sourdough. Melt the sandwich in the compound butter for about three minutes on each side or until the bread is golden brown and the cheese is melted.
Slice diagonally and serve with your favorite pale and tomato soup for an American Classic