We have all been there – you open the fridge to collect some milk for tea or coffee and then find that it has soured. Your first reaction might be to pour it down the sink, as yet another staple in ...

A fresh sponge cake topped with white icing, strawberries, and blueberries - Oksana Mizina/Shutterstock Nobody enjoys opening the fridge to find that their milk has gone bad. When milk goes sour, ...