How to Ripen Avocados Quickly

There's nothing more frustrating than buying avocados for dinner and finding they're rock hard. Here's how to speed up ripening, from most to least effective.

First: How to Tell When an Avocado Is Ripe

A ripe avocado:

• Gives slightly when pressed gently near the stem end (not mushy — just a gentle give)
• Is dark green to near-black (Hass variety)
• Has a stem that pops off easily, revealing green flesh underneath (brown = overripe)

Method 1: Paper Bag With a Banana (Best Method)

Avocados ripen through exposure to ethylene gas — a natural plant hormone. Bananas and apples produce a lot of it.

1. Place the avocado in a paper bag with a banana or apple
2. Close the bag loosely
3. Leave at room temperature

Hard avocados typically ripen in 1–3 days using this method. Check daily.

Why paper (not plastic)? Paper allows some airflow; a sealed plastic bag traps too much moisture and can cause the avocado to rot.

Method 2: Paper Bag Alone

Without a banana, a paper bag alone still accelerates ripening by trapping the avocado's own ethylene gas. Takes 2–4 days rather than 1–3.

Method 3: Room Temperature on the Counter

Simply leaving avocados on the counter (not in the fridge) ripens them naturally in 3–5 days, depending on how hard they are. Don't refrigerate unripe avocados — the cold halts the ripening process.

Method 4: The Oven Method (30 Minutes, With Trade-offs)

If you need a ripe avocado today:

1. Preheat oven to 93°C (200°F)
2. Wrap the avocado in aluminium foil
3. Bake for 10–30 minutes (check at 10 and every 5 minutes after)
4. Cool completely in the fridge before using

The heat triggers ethylene production and softens the avocado. However: the texture may be slightly different from naturally ripened — softer and less firm. The flavour is usually fine for guacamole or smashed avocado on toast but not ideal for sliced presentations.

What Doesn't Work

Microwave: can make the outside soft while the inside remains hard, and ruins the taste. Not recommended.

Warm water soak: some suggest placing an uncut avocado in warm water. Results are inconsistent and can make the skin separate.

Slowing Down Ripening

If your avocado ripens before you're ready for it:

• Move it to the fridge. Cold temperatures slow ripening significantly — a ripe avocado keeps for 3–5 days refrigerated.
• If it's already cut: squeeze lemon or lime juice over the flesh (acid slows oxidation), press cling film directly onto the surface, and refrigerate. Use within 1–2 days.