For avocados that are extremely hard and currently inedible, unfortunately this two minute hack will not do the trick.
Taste of Home provided another cheap hack for ripening an avocado that is rock solid.
For this one, all avocado lovers need is their avocado, an apple, a paper bag and up to 72 hours – although it could take as little as one day.
Pop your avocado in the paper bag alongside an apple.