You've already mastered how to pick a ripe avocado, but what's the trick to keeping the flesh green after you cut it?
Once it has been exposed to the air, avocados quickly turn a mushy brown colour - but there is a way to stop that happening.
Lifestyle website PureWow have shared their clever tip for keeping avo - and guacamole - green for up to 24 hours after you cut it open, and it requires just one, simple ingredient: cooking spray.
Next time you have some leftover avocado, spray it lightly with cooking spray - Olive oil, coconut oil or vegetable oil will work - then cover with plastic wrap and keep it in the fridge.
It means it should stay fresh for 24 hours.