Top 6 Ways to Ripen a Rock-Hard Avocado Fast + Yummy Ways to Eat Them. Posted by flavor_admin on 2023-08-11 Is your avocado too hard? Learn the best ways to ripen a rock-hard avocado fast, including one that takes just 10 minutes and one for already-sliced unripe avocados. Plus, check out some yummy ways to Source by k8tonrey