Portobello / Giant Cremini Mushroom (Raw)
Vegetables · Mushrooms
Portobello mushrooms have a small low-FODMAP serving of 9 g raw weight in the Monash app. The 14 g reference is moderate in mannitol and 75 g is high. The same entry uses the names portobella, portobello and giant cremini, so check the preparation as well as the shop label.
Serving sizes for portobello / giant cremini mushroom (raw)
Portobello / portobella / giant cremini, raw: 9 g green, 14 g amber, 75 g red. Mushroom fractions are approximate; weigh large caps.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 2 medium | 75 g | Mannitol 1.07 g | |
| 1/4 medium | 9 g | Mannitol 0.13 g | |
| 1/3 medium | 14 g | Mannitol 0.2 g |
Breakdown for 75 g
Is portobello / giant cremini mushroom (raw) low FODMAP?
The household descriptions are a quarter of a medium mushroom for 9 g, a third for 14 g, and two medium mushrooms for 75 g. These fractions are approximate: large caps sold for burgers can vary substantially in size. Mannitol changes from green to amber to red; the other five FODMAP indicators remain green.
Portobello / Giant Cremini Mushroom (Raw) and IBS: what to know
A whole portobello used as a burger bun or stuffed main should not be assumed to fit the small green portion. Weigh the raw mushroom you actually plan to eat. If you want a larger mushroom component, compare maitake, whose verified app entry has a different serving range, while still assessing the filling or sauce.
Gut-friendly ways to eat portobello / giant cremini mushroom (raw)
Use a measured amount of chopped portobello as one ingredient in a filling or vegetable mixture rather than relying on the number of caps. Record the raw amount before grilling, roasting or frying. This app check does not show that removing gills, peeling or cooking changes the listed mannitol limits, and it supplies no cooked-weight conversion.
Frequently asked questions
Is a whole portobello mushroom a low-FODMAP serving?
The tested green reference is only 9 g, described as a quarter of a medium mushroom. A whole cap needs weighing and should not be treated as that small serving.
Does grilling remove the mannitol?
The checked raw entry provides no evidence for that conversion. Use its raw-weight reference without increasing the portion on the assumption that grilling removes the limitation.
Does giant cremini mean every cremini preparation?
The entry names raw giant cremini alongside portobello and portobella. It does not establish matching portions for canned mushrooms, dried mushrooms or a prepared mushroom product.
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Sources and editorial notes
- Monash University FODMAP Diet App
Monash University FODMAP Diet app entry “Mushroom, portobella / portobello / giant cremini, raw” checked directly on 27 September 2026. The portion weights, traffic-light ratings and FODMAP groups discussed here were verified in matching detail panels. Numerical FODMAP concentration estimates elsewhere in the catalogue were not validated by this check.