Don’t chuck that sour milk – it’s perfect for baking | Waste Not

Sour milk is too useful to waste. Try using it to bake soda breadOne fifth of the 500m pints (360,000 tonnes) of milk discarded in the UK each year is thrown away because of the use-by label. This lactic waste produces 100,000 tonnes of CO2, or the same as the emissions from 20,000 cars, annually. But milk is usually fine to consume days after its use-by date, which is why the government waste scheme Wrap has suggested taking it off labels and leaving us to decide if our milk is OK to drink.A si