How to Store Mushrooms in the Refrigerator So They Stay Fresh Longer

Store mushrooms in a paper bag on a shelf, not in the crisper drawer

Mushrooms need air circulation and low humidity to stay fresh. The crisper drawer traps moisture, which causes them to turn slimy and develop mold within days. A paper bag lets them breathe while the refrigerator keeps them cool. Place the bag on a middle or lower shelf where the temperature stays steady—not near the back wall where it's coldest, and not on the door where temperature swings are biggest.

Do not wash mushrooms before storing them. Water speeds decay. If they're visibly dirty, wipe them gently with a dry cloth or a barely damp paper towel, then let them air-dry completely before bagging. Moisture is the enemy of mushroom storage.

Key Takeaways

• Paper bags work better than plastic because they allow air to circulate while keeping mushrooms at the right humidity level.
• Mushrooms last longest when stored on a refrigerator shelf rather than in the crisper, where trapped moisture causes them to spoil faster.
• Never wash mushrooms before storage—wipe them dry with a cloth instead, and only rinse them right before cooking.
• Most whole mushrooms keep for five to ten days in the refrigerator, depending on freshness when you bought them and how tightly they were packed.
• Sliced mushrooms deteriorate faster than whole ones and should be used within three to four days.

Why paper beats plastic for mushroom storage

Plastic bags and sealed containers trap condensation around the mushrooms. That moisture creates the perfect environment for bacterial growth and mold. Mushrooms are mostly water themselves, and they release moisture as they age. In a sealed space, that moisture has nowhere to go.

Paper bags absorb excess moisture while still insulating the mushrooms from the dry air of the refrigerator. A standard brown paper lunch bag works perfectly. If you don't have one, you can also wrap mushrooms loosely in paper towels and place them in an open container. The goal is to let air move around them while keeping them from drying out completely.

Some people use a damp paper towel inside a paper bag as a middle ground—the towel prevents the mushrooms from drying out too fast, while the bag still allows air to circulate. This works well if you're storing mushrooms for more than a week.

The right shelf location matters more than you think

Refrigerator temperature is not uniform. The back wall and the freezer compartment are coldest. The door is warmest and experiences the most temperature change every time you open it. Mushrooms prefer a steady, cool environment—around 35 to 40 degrees Fahrenheit.

Place your paper bag on a middle shelf, toward the front of the refrigerator. This spot stays consistently cold without the extreme cold that can damage cell structure, and it avoids the temperature swings of the door. If you have a dedicated vegetable shelf that's not the crisper, that's an ideal location.

How long mushrooms actually stay fresh

Whole mushrooms stored correctly in a paper bag typically last five to ten days. The exact timeline depends on how fresh they were when you bought them and how tightly they were packed at the store. Mushrooms sold loose last longer than those in plastic-wrapped packages, because they've already had some air exposure.

Sliced mushrooms deteriorate much faster—use them within three to four days. Once you cut into a mushroom, you expose the interior to air and bacteria, which speeds oxidation and decay. If you need to slice mushrooms ahead of time, store the slices in a paper towel-lined container with the lid slightly ajar, rather than sealed.

Check mushrooms every few days. If you see soft spots, dark discoloration, or a slimy film, they're past their prime. A few small dark spots are normal aging, but widespread discoloration or a strong ammonia smell means they should be discarded.

Preparing mushrooms for storage the right way

The moment you bring mushrooms home, remove them from any plastic packaging. If they came in a plastic clamshell, transfer them to a paper bag immediately. Leaving them in plastic accelerates spoilage.

Inspect them for visible dirt or debris. If they're clean, place them directly in the paper bag. If they're dusty or have soil clinging to them, wipe each one gently with a dry cloth or a paper towel. Do not rinse them under water—mushrooms absorb water like a sponge, and that absorbed moisture will cause them to decay faster.

Fold the top of the paper bag loosely closed, or leave it open. The goal is to let air circulate while preventing the mushrooms from rolling around and bruising each other. Bruised mushrooms deteriorate faster than unblemished ones.

What to do with mushrooms that are starting to age

Mushrooms don't go bad all at once. If you notice they're getting softer or developing dark spots but they're not yet slimy or moldy, cook them soon. Older mushrooms are still safe to eat and often have a deeper, more concentrated flavor. Sautéing them with garlic and butter is a good way to use them before they decline further.

If you won't use them in time, you can freeze them. Slice them, sauté them briefly in a dry pan to remove surface moisture, cool them completely, then freeze them in a single layer on a baking sheet before transferring to a freezer bag. Frozen mushrooms work well in soups, stews, and sauces, though they'll be softer than fresh ones when thawed.

Storing different mushroom varieties

Button, cremini, and portobello mushrooms all follow the same storage rules—paper bag, middle shelf, no washing. These are the most common varieties and the most forgiving to store.

Delicate varieties like oyster, shiitake, and enoki mushrooms are more fragile and may last only three to five days. Store them the same way, but check them more frequently. Enoki mushrooms in particular are prone to sliminess and should be used quickly.

Dried mushrooms don't need refrigeration at all—store them in an airtight container in a cool, dark cupboard. They'll keep for months. Fresh mushrooms and dried mushrooms should never be stored together, as the moisture from fresh ones will soften the dried ones.

Frequently Asked Questions

Can I store mushrooms in the freezer to make them last longer?

Yes, but freezing changes their texture. They become softer and more watery when thawed, so they work best in cooked dishes like soups, stews, and sauces rather than in salads or as toppings. Slice them, sauté them briefly to remove surface moisture, cool them, then freeze them in a single layer before bagging. They'll keep for several months frozen.

What if my mushrooms already smell like ammonia?

That smell means bacteria have begun breaking down the mushroom tissue. Discard them. Ammonia odor indicates advanced decay, and eating them could cause stomach upset. It's not worth the risk, even if they don't look obviously bad.

Should I remove the stem before storing mushrooms?

No. Store mushrooms whole, including the stem. Removing the stem exposes the interior to air and bacteria, which speeds decay. You can trim or remove the stem right before cooking.

Why do my mushrooms get slimy even in a paper bag?

They may have been stored in plastic at the store longer than you realize, or they were already older when you bought them. Check the bag daily and use them quickly if you see any softness. You can also try storing them with a paper towel inside the bag to absorb excess moisture, replacing the towel every two days.

Can I store mushrooms in the same bag as other vegetables?

Avoid storing mushrooms with high-moisture vegetables like tomatoes, lettuce, or cucumbers. Those vegetables release ethylene gas and moisture that will speed mushroom decay. Mushrooms do fine alongside harder vegetables like carrots or bell peppers, as long as they're in their own paper bag so air can still circulate.