"I think this turned out great, but to me the ratios were off a bit. I needed a lot for an event, so I used 4 cans of Guinness, 3 cups of sugar, 1 stick of butter, and I also added 1.5 tsp. salt. It tasted terrific. First you get the flavor of slightly salted caramel, but then the Guinness flavor kicks in and gives you that rich, slightly bitter distinctly "Guinness" finish.

If I were making this with a single can of Guinness, I'd up the sugar to 3/4 cup which helps with the aftertaste, reduce the butter a smidge to 2T instead of 3, and add a sprinkle of salt. In fact, I might even cut back the butter to 1 or 1.5T."