Sourdough Sour HeelThe heel of a loaf of sourdough bread rests on a cast iron pan.Guinness Sourdough IngredientsIngredients for a loaf of beer-based sourdough.Guinness DoughA rough blend of flour and beer kick off a bread making effort.Sour-dudOver-proofed bread from late-June 2021 during a local heat wave.Slice of SourA slice of sourdough bread rests on a cutting board.Honey Brown Lager BreadA loaf of sourdough cools on the countertop.Sourdough Mise en PlaceIngredients for a beer-based sourdough set out on a countertop.Proof of BreadA well-proofed loaf in a baneton.