A crimini is a brown-capped cultivated mushroom, firmer and earthier than a white button. You will also see it spelled cremini, or sold as baby bella, baby portobello, mini bella or Italian brown. Its species is Agaricus bisporus — and so is the white button mushroom, and so is the portobello.
They are the same mushroom at three different ages.
The same mushroom? Really?
Yes, and it is the most useful thing to know about it.
| Sold as | Stage | Character |
|---|---|---|
| White button | Youngest | Pale, soft, mild |
| Crimini / baby bella | Middle | Brown, firmer, earthier |
| Portobello | Oldest | Large, open cap, deepest flavour |
Selective breeding accounts for the colour, and harvest timing accounts for the rest. A crimini left to grow becomes a portobello. That is the whole difference.
This is why crimini costs slightly more than white button for what looks like the same thing: the grower held it longer.
So what does the extra age actually do?
Two things, both worth having.
Firmer flesh. More time means denser tissue and less water. A crimini holds its shape in a pan where a white button can slump, and it browns better because there is less moisture to drive off first.
Deeper flavour. The earthiness people describe as “more mushroomy” is real and comes with maturity. It is not a different taste from a white button so much as more of it.
What does crimini taste like?
Earthy, savoury, faintly nutty, with a clean finish. It is the flavour most people picture when they think “mushroom”, because it is the mushroom most Western cooking is built on.
It is the most forgiving variety on this list. It takes almost any treatment, pairs with almost anything, and rarely goes wrong.
How do you cook with it?
Anything you would do with a white button, and better.
- Sautéed — hot pan, don't crowd it, let it brown before stirring.
- Roasted — whole or halved, high heat.
- In sauces and braises — it holds up over long cooking.
- Raw, sliced thin — one of the few on this list that works raw.
- Pickled or fermented — it takes brine well and stays firm.
Salt it late. Salted early, it releases water and steams instead of browning.
Crimini or portobello — which do you want?
If the mushroom is a component, crimini. If it is the centrepiece — stuffed, grilled as a patty — portobello, because you want the size and the open cap.
For preserving, crimini every time. A portobello's open gills and higher water content make it a poor candidate for a jar.
Why do we pickle the crimini stage?
Because it is the stage where firmness and flavour meet.
A white button is too soft and too mild — it goes limp and tastes of the brine rather than itself. A portobello is too far the other way: too large, too open, too watery. The crimini stage is dense enough to keep a bite and developed enough to still taste like a mushroom afterwards.
We ferment it for 21 days, the same as white shimeji and eleven fewer than king oyster. Crimini caps are solid but not thick, so the brine works through evenly at three weeks. More on what fermenting changes.
How do we use crimini?
As the familiar one. It is the variety that gives someone a reference point — they know what a crimini tastes like, so they can taste what fermenting did to it. It is also the one we use in the pickled mushroom martini, because it is firm enough to sit on a pick.
Read about our pickled crimini, compare all five, or build a pack and choose your jars.
The short version
A crimini is Agaricus bisporus — the same species as the white button mushroom and the portobello, harvested at the middle stage. That extra maturity makes it firmer and earthier than a button, and smaller and denser than a portobello. It is the most versatile mushroom on this list, works raw or cooked, and it is the stage worth preserving because it keeps both its bite and its flavour.