Are these mushrooms safe to eat?

I was chopping up some portabella mushrooms (purchased at Costco) for a stir fry and noticed that the flesh of some of the mushrooms turned a dark brown (left):

It has a slightly rougher texture, and smells stronger than the whiter mushrooms. Never seen a mushroom like this before, is it safe to eat?

food-safety mushrooms

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Quick Answer about "Are these mushrooms safe to eat?"

Look for mushrooms with gills that are brown or tan. While some mushrooms with white gills are edible, the most deadly and poisonous mushroom family—Amanitas—nearly always have white gills. Select mushrooms without red on the cap or stem. Choose mushrooms with white, tan or brown caps and stems.

What mushrooms should you avoid?

Poisonous mushrooms to avoid

Death cap (Amanita phalloides). ...
Conocybe filaris. ...
Autumn skullcap (Galerina marginata). ...
Death angel (Amanita ocreata). ...
False morels (Gyromitra esculenta and Gyromitra infula).

Which mushrooms are poisonous UK?

Here are seven poisonous mushrooms to watch out for in the UK.

Deadly webcap (Cortinarius rubellus) ...
Death cap (Amanita phalloides) ...
Destroying angel (Amanita virosa) ...
Funeral bell (Galerina marginata) ...
Fool's funnel (Clitocybe rivulosa) ...
Panther cap (Amanita pantherina) ...
Angel's wings (Pleurocybella porrigens)

What mushrooms are safe to eat Australia?

Pine caps and slippery jacks are the most common edible mushrooms in Australia according to the Australian National Botanic Gardens (ANBG). Pine caps, also known as saffron milk caps, are bright orange in colour and have milky sap when the are cut.

What mushrooms are safe to eat UK?

Some UK mushrooms are easy to identify so quite safe to eat, the Giant Puffball, Beefsteak Fungus, Porcelain Fungus, Cauliflower Fungus, Dryads Saddle, the Hedgehog Fungus, if you are very lucky the Truffle, Wood Ears (as long as they are growing on elder) and Chicken of the Woods (as long as it is not growing on a Yew ...