3 hr 15 min — Hard — British
125g of cool mashed potato works into the dough alongside 350g of rye flour and 50g of wholemeal bread flour, giving the crumb a dense, moist structure without heaviness. Fifty grams of molasses or black treacle deepens the color to near-black and adds a low, bitter sweetness. Caraway seeds are optional but lean into the northern European character of the loaf. Total time runs just over three hours including proofing; the finished loaf slices into 12 and holds up well to thick sandwich fillings for two to three days.