Combine the brown sugar, stout and cayenne until thick and syrupy.

Lay bacon on a wire rack over a rimmed baking sheet.

Brush bacon with beer syrup on both sides.

Cook at 350 for ten minutes, flip and re-brush with beer syrup.

Cook for 8 to 10 more minutes or until the bacon is an amber color.

Remove from oven and allow to cool. Bacon will harden as it cools.