Resurrect your Bread – again and again… Reusing old bread in new bread recipes is a common way to use leftovers from a previous bread production.According to various experiments (in house), it is possible to add up to 20% old bread in a bread recipe – of the same type of bread. There is a few conditions, which must be met in the process. The bread should not be moulded in any way it is easy to smell if the bread has started to mould – it smells like an “old wet basement” or if the mould is visible on the bread. Discharge the whole bread if it is mouldy.