1. Keeping The Pit In
This method is an oldie, but a goodie, and most avocado lovers will be familiar with it. But what you’ve likely found is that the fleshy parts around the pit are still prone to oxidization (that’s mixing with the air around it) and browning. But when you pull out the pit, it’s still perfect underneath. You could invest in an avocado hugger, which is a reusable silicone cover that works to prevent your fruit from browning. Keep the pit in, belt the avocado up, store it in the fridge, and it’s good as new!
2. Storing The Avocado In Water
All you need to do here is put your remaining avocado in a glass jar of water, seal it, and pop it in the fridge. It usually prevents the avocado from going brown, but it does leave it with a slightly mushier texture. Recommend this if you’re looking to make a big batch of guacamole, but if you’re after a firm avocado, there’s likely another method for you.
3. Covering It In Cling Film
If we’re trying to prevent the oxidization of the avocado, cling film is a great choice. While it’s not entirely fool-proof, and the use of single-use plastic is a growing burden on the environment, it’s a quick and easy option. Simply wrap the avocado nice and tight (and that part is key) in the cling film of your choice. If you’re looking for a more sustainable option, try a reusable beeswax wrap.
It is important to mention that this method proves quite successful for keeping guacamole fresh for a longer time. When storing it, gently press the wrap down onto the surface of the mixture in a bowl or container to remove all of the air, and you’ll have fresh guacamole for days.
4. Storing The Avocado With Onion
This idea seems a little excessive, but if you’re someone who likes your avocado savoury, it’s worth a try. Simply popping your avocado in an airtight container with a few slices of onion, before storing it in the fridge, is one of the most effective ways to keep the fruit fresher for longer. This is because of the incredible sulphur compounds found in onions that exert a protective effect on the air around them. You’ll find your avocado stays fresh for an extra couple of days with this method.
5. Drizzling The Avocado In Lemon Juice
A quick squeeze of lemon juice over any fresh avocado works as a truly natural preservative. This is due to the ascorbic acid (aka vitamin C) found in lemon or lime juice, adding citrus to an opened avocado helps create a barrier against oxygen that reduces oxidation. As the oxygen reacts with the acid in the juice, it slows down the chemical reaction and prevents browning for a few days.
The above words, and more, can be seen in article here
If you don't like avocados (and not everyone does) how about these avocado substitutes see here
All the best Jan