Summer has arrived in the UK, and lighter meals like salads are popular. Avocado adds creamy texture and nutrients, but once cut, it quickly turns brown and mushy due to the enzyme polyphenol oxidase reacting with oxygen. Proper storage is key to preserving its green freshness.
The Cling Film Hack
Experts recommend wrapping sliced avocado tightly in cling film to slow browning. The plastic creates a barrier that limits oxygen exposure, keeping the fruit fresh for at least two days. Food website Food Matters explains: "If we're trying to prevent the oxidization of the avocado, cling film is a great choice. While it's not entirely foolproof, and the use of single-use plastic is a growing burden on the environment, it's a quick and easy option."
For a sustainable alternative, reusable beeswax wraps can be used. The key is to press the wrap directly onto the avocado flesh, removing all air pockets. This method also works well for guacamole—press the wrap onto the surface to keep it fresh for days.
Additional Tips for Longer Freshness
After wrapping, place the avocado in an airtight container and refrigerate. The cold temperature inhibits enzymes responsible for browning. Adding a squeeze of lemon or lime juice provides an extra antioxidant barrier, as citric acid slows polyphenol oxidase. However, this may slightly alter the flavour.
Experts at Real Simple advise: "If the avocado is already sliced, your best course of action is to grab a food storage container. However, instead of using the corresponding top, cover the container with plastic wrap, making sure the wrap comes in direct contact with the avocado and there are no air pockets."
Why Avocados Brown
Browning occurs when polyphenol oxidase in avocado flesh reacts with oxygen. This natural process can be delayed by minimizing air exposure. Cling film and refrigeration are effective, simple solutions that prevent food waste and keep avocado ready for salads, sandwiches, or guacamole.
