How to ripen avocados overnight without a paper bag?
Can avocados ripen in a plastic bag?
This will speed things up by a day or two; you should have a ripe avocado in three to six days. Stashing the fruit in a paper bag keeps them warm and helps trap the ethylene gas. And yes, go for paper, not plastic. “The plastic will sweat and the fruit will sweat and the plastic will keep the moisture in,” says Shade.