
Portabella mushrooms are a popular and versatile ingredient in many cuisines, known for their meaty texture and rich flavor. For those mindful of their caloric intake, understanding the nutritional content of these mushrooms is essential. A single medium-sized portabella mushroom, weighing approximately 100 grams, contains around 22 calories, making it a low-calorie option for adding substance to meals. This calorie count primarily comes from carbohydrates and protein, with minimal fat content, positioning portabella mushrooms as a healthy and nutrient-dense choice for diets focused on weight management or overall wellness.
| Characteristics | Values |
|---|---|
| Calories (per 100g) | 22 kcal |
| Calories (per medium-sized portabella mushroom, approx. 100g) | 22 kcal |
| Calories (per 1 cup, sliced, approx. 70g) | 15 kcal |
| Calories (per 1 large portabella mushroom cap, approx. 150g) | 33 kcal |
| Fat | 0.3g (per 100g) |
| Carbohydrates | 3.6g (per 100g) |
| Fiber | 1.3g (per 100g) |
| Protein | 2.1g (per 100g) |
| Vitamin D | 0.1mcg (per 100g) |
| Potassium | 394mg (per 100g) |
| Sodium | 6mg (per 100g) |
| Note: Values may vary slightly depending on the source and specific mushroom size/preparation method. The above values are based on raw, fresh portabella mushrooms. |
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What You'll Learn

Raw vs. Cooked Portabella Calories
A raw portabella mushroom contains approximately 18 calories per 100 grams, making it a low-calorie option for those mindful of their intake. This value is based on its minimal fat content and high water composition, typical of most mushrooms. However, the calorie count changes when you apply heat, as cooking alters both the mushroom’s weight and nutrient density. Understanding this shift is crucial for anyone tracking their caloric intake or optimizing their diet.
Cooking portabella mushrooms reduces their water content, concentrating their nutrients and calories per gram. For instance, a 100-gram raw portabella shrinks to about 75 grams when grilled or sautéed. Despite the weight loss, the calorie density increases because the same amount of calories is now packed into a smaller volume. A cooked portabella typically contains around 24 calories per 100 grams, a modest but notable increase. This change is primarily due to water evaporation, not the addition of calories, but it affects portion perception and macronutrient ratios.
From a practical standpoint, the calorie difference between raw and cooked portabellas is minimal, but it matters for precise dietary planning. For example, if you’re following a low-calorie diet, opting for raw portabellas in salads or wraps can help maintain lower overall intake. Conversely, cooking portabellas enhances their umami flavor and texture, making them a satisfying addition to meals without significantly increasing calories. Pairing cooked portabellas with healthy fats like olive oil or avocado can also improve nutrient absorption, particularly for fat-soluble vitamins like D and B vitamins.
For those tracking macros, note that cooking slightly increases the protein concentration per gram due to water loss, though the absolute protein content remains nearly unchanged. A 100-gram raw portabella provides about 2.1 grams of protein, while the same weight of cooked mushroom offers roughly 2.8 grams. This adjustment is minor but beneficial for individuals aiming to maximize protein intake without adding calories. Ultimately, whether raw or cooked, portabellas remain a nutrient-dense, low-calorie food that fits into various dietary strategies.
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Nutritional Value of Portabella Mushrooms
A single portabella mushroom, weighing approximately 100 grams, contains around 22 calories, making it an exceptionally low-calorie food choice. This calorie count is primarily derived from its carbohydrate and protein content, with minimal fat. For those monitoring their caloric intake, portabellas offer a nutrient-dense option without significantly impacting daily limits.
Beyond calories, portabella mushrooms are a treasure trove of essential nutrients. They are rich in B vitamins, particularly riboflavin, niacin, and pantothenic acid, which support energy metabolism and nervous system health. Additionally, they provide a notable amount of potassium, a mineral crucial for heart health and muscle function. A 100-gram serving delivers roughly 300 mg of potassium, comparable to a small banana.
One of the most compelling aspects of portabellas is their high selenium content, an antioxidant mineral that plays a vital role in immune function and thyroid health. A single mushroom provides about 10 micrograms of selenium, nearly 18% of the daily recommended intake for adults. This makes portabellas an excellent dietary addition for those seeking to boost their antioxidant defenses.
For practical incorporation into meals, portabellas’ meaty texture and umami flavor make them a versatile ingredient. Grill them as a burger substitute, stuff them with quinoa and vegetables for a fiber-rich dish, or sauté them with garlic and herbs for a low-calorie side. Their ability to absorb flavors while retaining nutritional integrity ensures they enhance both taste and health benefits in any recipe.
In summary, portabella mushrooms offer a low-calorie, nutrient-packed profile that supports various aspects of health, from energy metabolism to immune function. Their versatility in cooking ensures they can be seamlessly integrated into diets, making them an ideal choice for health-conscious individuals seeking both flavor and nutrition.
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Serving Size Calorie Breakdown
A single portabella mushroom, weighing approximately 100 grams, contains around 22 calories. This makes it a low-calorie food choice, ideal for those monitoring their caloric intake. However, serving sizes can vary significantly, and understanding these variations is crucial for accurate nutritional planning. For instance, a small portabella (about 70 grams) contains roughly 15 calories, while a larger one (150 grams) can have up to 33 calories. This simple breakdown highlights how portion size directly impacts calorie consumption.
When preparing portabella mushrooms, cooking methods can alter their calorie content. Grilling or baking a 100-gram portabella without oil adds negligible calories, keeping the total close to 22. However, sautéing in a tablespoon of olive oil (120 calories) increases the dish to approximately 142 calories. For those aiming to keep calories low, steaming or grilling are recommended. Additionally, stuffing a portabella with cheese or meat can turn it into a higher-calorie meal, with fillings potentially adding 100–300 calories depending on the ingredients.
For individuals tracking macros or following specific diets, knowing the calorie density of portabella mushrooms per serving is essential. A 100-gram portabella provides 2.1 grams of protein, 3 grams of carbohydrates, and 0.3 grams of fat, making it a nutrient-dense, low-calorie option. For example, a 200-calorie meal plan could include two large portabellas (66 grams each) paired with a side of steamed vegetables, offering volume and satiety without exceeding calorie limits. This approach is particularly useful for weight management or low-calorie diets.
Practical tips for portion control include using a kitchen scale to measure mushrooms accurately, as eyeballing can lead to under or overestimating calories. For recipes, consider slicing a 100-gram portabella into four pieces to serve as a burger substitute, providing a satisfying texture with only 22 calories. When dining out, ask for portabellas to be prepared without added oils or sauces to maintain their low-calorie profile. By focusing on serving size and preparation, portabella mushrooms can be a versatile, calorie-conscious addition to any diet.
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Calories in Stuffed Portabella Recipes
A single portabella mushroom cap contains approximately 20-30 calories, making it a low-calorie base for stuffed recipes. However, the total calorie count of a stuffed portabella dish can vary widely depending on the filling ingredients and portion sizes. To create a balanced, calorie-conscious meal, consider the following strategies and examples.
Analyzing Filling Choices: The calorie content of stuffed portabellas hinges largely on the filling. For instance, a classic crab-stuffed portabella can range from 150 to 300 calories per serving, depending on the amount of crabmeat, breadcrumbs, and butter used. In contrast, a vegetarian option with quinoa, spinach, and feta typically clocks in at 120-180 calories. To reduce calories, opt for lean proteins like grilled chicken or tofu, and use low-fat cheeses or Greek yogurt instead of cream-based sauces.
Step-by-Step Calorie Control: When crafting your own stuffed portabella recipe, start by preheating the oven to 375°F (190°C). Clean the mushroom caps and remove the stems, which can be chopped and added to the filling for extra flavor without significantly increasing calories. For a 200-calorie serving, combine ¼ cup cooked brown rice (50 calories), 2 tablespoons shredded part-skim mozzarella (40 calories), and ¼ cup sautéed vegetables (10 calories). Stuff the mixture into a medium-sized portabella cap and bake for 20-25 minutes. This approach ensures a satisfying meal without excess calories.
Comparing Popular Recipes: Stuffed portabella recipes often differ in calorie density based on their culinary inspiration. For example, an Italian-style version with marinara sauce, ricotta, and Parmesan may contain 250-350 calories per serving, while a Mediterranean-inspired recipe with hummus, olives, and chickpeas typically stays under 200 calories. Asian-inspired fillings, such as teriyaki-glazed shrimp and scallions, can range from 180 to 250 calories, depending on the sauce and protein portion. Choosing recipes with lighter sauces and whole-food ingredients can help keep calories in check.
Practical Tips for Calorie Reduction: To minimize calories without sacrificing flavor, focus on ingredient swaps and portion control. Replace traditional breadcrumbs with panko or almond flour for a lower-calorie crunch. Use herbs, spices, and citrus juices to enhance flavor without adding calories. Limit high-calorie toppings like bacon or full-fat cheeses, and instead, garnish with fresh herbs or a drizzle of balsamic glaze. For a family-friendly meal, serve stuffed portabellas alongside a large salad or steamed vegetables to increase volume and nutrients while keeping overall calories moderate. By making mindful choices, you can enjoy indulgent-tasting stuffed portabellas that align with your dietary goals.
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Portabella vs. Other Mushroom Calories
Portabella mushrooms, often hailed as a meaty alternative in vegetarian dishes, contain approximately 18-20 calories per 100 grams. This low-calorie count makes them a popular choice for health-conscious eaters, but how do they stack up against other mushrooms? Let’s dive into the calorie comparisons and practical implications.
Consider the button mushroom, a staple in salads and stir-fries. At around 22 calories per 100 grams, it’s slightly higher in calories than the portabella. However, the difference is minimal, making both excellent options for low-calorie diets. Shiitake mushrooms, prized for their umami flavor, weigh in at about 34 calories per 100 grams. While still low, they’re notably higher than portabellas, which may matter for those tracking calories closely. For context, if you’re preparing a mushroom-heavy dish, swapping shiitakes for portabellas could save you 14 calories per 100 grams—a small but meaningful difference over larger portions.
Now, let’s talk oyster mushrooms, which are often used in soups and sautés. They contain roughly 33 calories per 100 grams, similar to shiitakes. If you’re aiming for the lowest-calorie option, portabellas edge out both. However, the choice shouldn’t solely hinge on calories. Texture and flavor play a role too. Portabellas have a denser, meatier texture, while oyster and shiitake mushrooms offer a more delicate, earthy taste. For a calorie-conscious meal, pair portabellas with low-calorie vegetables like spinach (23 calories per 100 grams) or zucchini (17 calories per 100 grams).
For those on restrictive diets, such as keto or paleo, portabellas shine not just for their calorie count but also for their versatility. A single large portabella cap (about 100 grams) provides a satisfying base for burgers or pizzas without adding significant calories. In contrast, a 100-gram serving of cremini mushrooms, often used interchangeably with portabellas, contains around 22 calories—slightly higher but still diet-friendly. The key takeaway? Portabellas offer a slight calorie advantage, but the difference is modest enough that you can choose based on recipe needs.
Finally, let’s address portion control. A typical portabella cap used in cooking weighs around 70-90 grams, translating to roughly 13-18 calories. Compare this to a cup of sliced button mushrooms, which clocks in at about 15 calories. While the calorie difference is negligible, portabellas provide a larger, more filling portion due to their size and density. For weight management, this can be a psychological win, as you get more “food” for fewer calories. Pair a grilled portabella cap with a side of steamed broccoli (34 calories per 100 grams) for a 150-calorie meal that feels substantial.
In summary, while portabellas aren’t dramatically lower in calories than other mushrooms, their slight advantage, combined with their size and texture, makes them a standout choice for calorie-conscious cooking.
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Frequently asked questions
A raw portabella mushroom (about 100 grams) contains approximately 22 calories.
A grilled portabella mushroom (100 grams) typically has around 25-30 calories, depending on added oils or seasonings.
A large portabella mushroom cap (around 150 grams) contains roughly 33-40 calories, depending on preparation.
Cooking a portabella mushroom slightly increases its calorie count due to moisture loss, but the difference is minimal unless additional fats or oils are used.











































