Nutrition referencePortobello mushroom is a large, mature mushroom with a meaty texture, often used as a meat substitute. Per 100 g it provides about 32 calories with 4.7 g carbs.
Nutrition facts
2003598 · Foundation Foods, April 2026 (2026-04-30 export)
169255 · SR Legacy, final April 2018 release
About this food
Portobello mushroom is the mature form of the common white mushroom, with a large, flat cap and a dense, meaty texture. It is often grilled, roasted, or stuffed and used as a meat substitute.
Nutritionally, portobello mushroom is low in calories and fat. Per 100 g it provides about 32 kcal, 4.7 g of carbohydrates, 2.8 g of protein, 0.3 g of fat, and 1.9 g of dietary fiber.
Portobello mushrooms are usually cooked before eating. For accurate tracking, weigh the mushroom and use the serving sizes below.
Plan your portion
Nutrition values are reported per 100 g. A typical mushroom cap (about 84 g) provides roughly 27 kcal. Use the serving sizes below to estimate portions when logging.
| Serving | Weight | Calories | Carbs | Protein | Fat |
|---|---|---|---|---|---|
| 100 g | 100 g | 32.4 kcal | 4.7 g | 2.8 g | 0.3 g |
| 1 mushroom cap | 84 g | 27.2 kcal | 3.9 g | 2.3 g | 0.3 g |
| 1/2 cup sliced | 43 g | 13.9 kcal | 2 g | 1.2 g | 0.1 g |
Use the weight of the edible portion in the food state shown above.
Questions and answers
Portobello mushroom provides about 32 calories per 100 g.
Yes. Portobello mushroom provides only about 32 calories and 0.3 g of fat per 100 g.
Portobello mushroom provides about 2.8 g of protein per 100 g.
