How to Keep Avocados Fresh (See Our Test Results!)

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Toast with avocado and cress
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Avocado is the bacon of fruits: everything tastes better with avocado. Unfortunately, avocados go bad quickly, taking on a brownish hue with a sometimes-rancid odor and bitter taste. This is because avocados have an enzyme called polyphenol oxidase that, when exposed to air, causes the avocados to oxidize and turn brown. To keep my avocados fresher for longer, I decided to test different methods people use to keep them from oxidizing.

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Avocado with chopped onion
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Method 2: Avocado with Onion

Three days: No change in surface color or texture. One week: No change in surface color, texture was slightly softened. Ten days: Very slight browning, but overall look and texture was the same as after three days. It did slightly take on the smell and taste of the onion.

Image Credit: Elizabeth Biscevic
Avocado with lemon wedge
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Method 3: Avocado with a Lemon Wedge

Three days: The avocado looked pretty similar to the first day, with very little change to the surface color and texture. One week: Slight browning and the texture was notably softer than before, but otherwise still okay. Ten days: The surface was bruised with a softer texture. It was questionably edible, but I didn't risk it. You can eat around the dark spots of an avocado, but it was a bit too soft for me to try.

Image Credit: Elizabeth Biscevic
Avocado with lemon wedge after 10 days
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Avocado with Lemon Wedge After 10 Days

The avocado after 10 days.

Image Credit: Elizabeth Biscevic
Avocado with lemon juice
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Method 4: Avocado with Lemon Juice

Three days: Slightly brown and bruised across the surface, texture was very soft and kind of slimy from the juice. One week: Surface of the avocado was brown and extremely soft. The avocado surface had changed to a slimy, stringy texture. Though it didn't smell rancid or rotten because of the lemon juice was still overpowering, the color and consistency indicated heavy oxidation and that the avocado was no longer edible. Using lemon juice may be a good short-term storage solution, but not for more than 3 days in the refrigerator. The avocado will still have a slimier texture and take on the flavor of the lemon; but I am personally okay with that, especially if I plan on using it for guacamole.

Image Credit: Elizabeth Biscevic
Avocado in foil
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Method 5: Avocado Wrapped Tightly with Foil or Cling Wrap

Three days: Some small, light, bruises on the surface, but the avocado looked and felt similar to the first day. One week: The avocado had darker and larger bruises across the surface, and the consistency was significantly softer than the first day. But there was no film, stringy texture or dangerously soft areas. The avocado was still edible, especially if you wanted to add some spices and lime for a batch of guacamole. Ten days: The avocado consistency was very soft, and its bruises were too dark for it to be considered edible. This method works best for short-term storage.

Image Credit: Elizabeth Biscevic
Avocado in foil after 10 days
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Wrapped Avocado After 10 Days

Avocado wrapped in foil after 10 days.

Image Credit: Elizabeth Biscevic
avocado in a container
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What Worked Best?

If you plan on keeping your avocado for only a few days, every option works as a way to keep your avocado fresh for a day or two. For longer storage, the best method is using cut-up onion, and the runner-up is keeping the pit inside. Depending on your personal preferences, you may opt for the avocado-with-pit method, as the avocado stored with onions will start to take on an onion-like smell and taste.

Image Credit: Elizabeth Biscevic

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