I love Guiness, nuts and also sourdough bread (though not necessarily in that order). So it is inevitable that one day, all these should come together into a loaf.
I did just that a couple of days ago. Here is the result.
I made two loaves. They were slightly under-proofed. Both of them had tears along the sides when baked. I sliced one loaf today afternoon.
The crust was thin and dark. The crumb was soft and the taste, tart. Which was to be expected, since the only liquid use was Guinness. It combined well with a thin layer of strawberry jam.