1 cup (medium) of Button Mushroom (70 g) has 15 calories. That works out to 22 calories per 100 g. It contains 2.3 g of carbs, 2.2 g of protein, 0.2 g of fat and 0.7 g of fiber. Its 11.2 µg of Biotin covers 37% of the Daily Value. Its glycemic index is 15 (low), so it raises blood sugar slowly.

What is Button Mushroom?

Button mushrooms are the young, pale-capped form of Agaricus bisporus, a cultivated mushroom sold whole or sliced. They are grown around the world and have a mild, earthy flavour that deepens with cooking. Their texture softens in the pan but can retain a little bite. They work well sautéed, roasted, stirred into soups and pasta, or folded into omelettes; in many places they are also a familiar pizza topping. Cook them in a hot pan so they brown rather than steam, then season to taste.

They are mostly water and low in calories, with some fibre and B vitamins; a 100 g portion provides 22 calories. Their protein contribution is modest, so pair them with eggs, beans, tofu or another protein-rich food for a more filling meal. For a lighter preparation, use a little oil and herbs instead of a rich cream sauce.

Button Mushroom Nutrition Facts

Selected: 100 g

KCAL / 100G

Carbs

3.3g

· 1% DV

Protein

3.1g

· 6% DV

Fat

0.3g

· 0% DV

Fiber

· 4% DV

DV is the share of the daily value covered, on a 2,000 kcal reference diet.

Calories come from: Carbs 47% · Protein 44% · Fat 9%

Button Mushroom Vitamins & Minerals

Vitamins

Biotin

16µg · 53% DV

0.4mg · 31% DV

1.5mg · 30% DV

3.6mg · 23% DV

Minerals

Selenium

9µg · 16% DV

Phosphorus

86mg · 12% DV

Zinc

1mg · 9% DV

Potassium ⭐

318mg · 9% DV

How Nutritious Is Button Mushroom?

Nutrient density

High

70/ 100

How many vitamins, minerals and how much fiber this food carries per calorie. A high score means a lot of nutrition for few calories.

Satiety score

Medium

47/ 100

An EatBetter score computed from fiber, protein and calorie density. A high score means staying full longer on the same calories.

Both scores are calculated per 100 g and do not change with the selected portion. The satiety score is EatBetter's own calculation, not a clinical measure.

Button Mushroom Glycemic Index

GLYCEMIC INDEX

Low

0 Low5570100

GLYCEMIC LOAD

0.5

Low

Accounts for portion size — a more realistic measure than GI alone.

How to Burn Off Button Mushroom

To burn the 22 calories in 100 g:

🚶

5min

Walking (5 km/h)

🏃

2min

Running (8 km/h)

🚴

3min

Cycling

🏊

3min

Swimming

Times are calculated with the MET equation for a 70 kg adult. Actual burn varies with your weight, age and pace.

Is Button Mushroom Processed?

NOVA 1

Unprocessed

1. Unprocessed

2. Minimally Processed

3. Processed

4. Ultra-Processed

NOVA classifies foods into 4 groups by industrial processing. NOVA 1 (unprocessed) is the healthiest.

Does Button Mushroom Contain Allergens?

No known major allergens

Gluten free

Dairy free

Eggs free

Peanuts free

Tree nuts free

Fish free

Soy free

Sesame free

Which Diets Is Button Mushroom Good For?

Vegan

✓ Suitable

Vegetarian

✓ Suitable

Gluten-Free

✓ Suitable

Dairy-Free

— Not suitable

Mediterranean

✓ Suitable

Paleo

✓ Suitable

Whole30

— Not suitable

DASH

— Not suitable

Keto

✓ Suitable

Low FODMAP

— Not suitable

Button Mushroom Fat Profile

SATURATED

0.05g

MONOUNSATURATED

0.01g

POLYUNSATURATED

0.06g

⚖️

Omega 6:3 ratio 5:1

Above the ideal 4:1 (5:1).

Compare Button Mushroom

🍄vs🍅

Button Mushroom vs Tomato4 kcal more per 100 g

→🍄vs🥗

Button Mushroom vs Mixed Green Salad4 kcal more per 100 g

→🍄vs🫑

Button Mushroom vs Red Pepper9 kcal fewer per 100 g

→🍄vs🥄

Button Mushroom vs Boiled Beetroot22 kcal fewer per 100 g

→

Foods Similar to Button Mushroom

🍅

Tomato

18 kcal

🥗

Mixed Green Salad

18 kcal

🫑

Red Pepper

31 kcal

🥄

Boiled Beetroot

44 kcal

🫑

Green pepper

20 kcal

🥗

Potato Salad

110 kcal

🥗

Arugula

25 kcal

🥕🥦🍆

Oven-Roasted Mixed Vegetables

65 kcal

Frequently Asked Questions About Button Mushroom

How should you clean button mushrooms?

Wipe button mushrooms with a damp paper towel or brush off any dirt with a soft brush. Trim the dry end of the stem, then prepare the mushrooms soon after cleaning so they do not sit damp.

Should you wash button mushrooms before cooking?

Yes, you can rinse button mushrooms briefly under running water, but do not leave them soaking. Pat them dry right away; mushrooms left wet can brown less effectively and release extra moisture in the pan.

How should you store button mushrooms?

Keep button mushrooms in the refrigerator in a paper bag or a container lined with paper towel, rather than sealed in damp plastic. The paper helps absorb moisture, which can otherwise make the mushrooms slimy and shorten their shelf life.

Can you eat button mushrooms raw?

Yes, button mushrooms can be eaten raw once they are clean and fresh. Slice them thinly for salads or serve them with a dip; cooking gives them a deeper flavor and softer texture.

Can you freeze button mushrooms?

Yes, button mushrooms freeze well after being sautéed and cooled; pack them in an airtight container and freeze. You can freeze them raw, too, but they are likely to turn softer and release more water after thawing.

Do you need to peel button mushrooms?

No, button mushrooms do not need to be peeled. Wipe or rinse them clean and use the cap and stem; remove only damaged or particularly dirty outer bits if cleaning does not get them clean.

Why do button mushrooms get watery when cooked?

Button mushrooms release moisture when crowded in a pan, so they steam instead of browning. Cook them in a single layer in a hot, wide pan, leave the pan uncovered, and add salt after they begin to brown.

How can you tell if button mushrooms have gone bad?

Discard button mushrooms that are slimy, moldy, or have a distinctly sour or unpleasant smell. A little darkening alone does not always mean they are spoiled, so check the texture and smell as well.

Why do button mushrooms turn brown after cutting?

Cut button mushrooms can turn brown as their exposed surfaces react with air. This discoloration alone does not mean they have spoiled; to limit it, slice them shortly before cooking or serving.

Can you eat the stems of button mushrooms?

Yes, button mushroom stems are edible and can be cooked along with the caps. Trim off only the dry, tough end, then slice the rest for omelets, soups, or sautés.

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Nutrition data compiled from USDA FoodData Central and scientific sources.

· Last updated: September 24, 2026