Gourmet · Pleurotus hybrid
Black pearl oyster
Dark caps and a firm stem. Growers sell it as a cross between king oyster and oyster, and it eats like both.
- Season:
- Year-round from indoor growers
- Updated:
What it is
Black pearl oyster (sometimes sold as black king or blue king oyster) is a cultivated Pleurotus with dark gray to nearly black caps on a thick, firm white stem. Growers describe it as a cross between king oyster and the common oyster mushroom, and that's how it eats: more stem than an oyster, more cap than a king.
It's a newer variety and mostly a specialty-farm crop, so you're most likely to find it at a market stand or in a farm box. Some farms call it "queen oyster."
Taste and cooking
Black pearls are savory and a little deeper in flavor than blue oysters, with a dense stem that browns well. The dark caps fade to brown when cooked.
- Halve or quarter clusters lengthwise so each piece has some cap and some stem.
- Sear cut-side down in a hot pan until golden, then flip and add butter.
- Grill them brushed with oil. The stems hold together better than regular oysters.
Cook them through. They work anywhere you'd use king oyster or shiitake.
How it's grown
Like king oysters, black pearls grow indoors on supplemented hardwood sawdust. They fruit as small clusters with thicker stems than the common oyster. Farms grow them year-round, and spawn suppliers sell them to home and commercial growers.
Storing it
Black pearls keep better than most oyster mushrooms because of their dense stems. Store them in the refrigerator in a paper bag or their original container (Penn State Extension's guidance for fresh mushrooms), and cook them within a few days. Firm stems and dry caps are good signs; slimy caps or a sour smell are not.
Where to buy black pearl oyster
2 growers in our directory list black pearl oyster by name@if ($ohio->isNotEmpty()), 1 of them in Ohio. Availability changes with the season and the harvest, so check with the farm before you go.
@endifRich Life Farm
Cincinnati, OH
Blue oyster, white oyster, black pearl, king oyster, pink oyster (summer), lion's mane, chestnut, pioppino, comb tooth, golden enoki; shiitake and maitake at times
- Ships
- Not stated
- Sells to restaurants
- Yes
Terra Mushroom Farm
Dallas-Fort Worth, TX
Lion's mane, chestnut, oyster, black pearl king; grow kits
- Ships
- Not stated
- Sells to restaurants
- Yes
Does the science say…?
We didn't find any human studies on black pearl oyster specifically. It's a Pleurotus, and a 2020 review of clinical trials on the common oyster mushroom found low-quality evidence for modest effects on blood sugar and cholesterol (see our oyster guide). Those trials don't tell us anything definite about black pearl.
Penn State researchers have shown that antioxidant content varies widely between mushroom species (Kalaras et al., 2017), so even related mushrooms can differ. Buy black pearl for its flavor and texture; we found no studies of it for anything else.