Potters malt extract 650g potters founded its malt extract business in 1908 at douglas works in wigan where the laxey wheel the largest water wheel in the world in its day was built potters malt extract continues to be just as popular today and is manufactured at its state of the art factory still in wigan potters malt extract a traditional nutritious and versatile malt extract can be spread on bread and toast added to cereals used as a replacement for refined sugar in bread cak