Carb Information for Mushrooms

Mushroom Carbs, Nutritional Information and Low-Carb Recipes

White button and brown crimini mushrooms
White button and brown crimini mushrooms. Karen Struthers

There are many types of mushrooms.  White button mushrooms and brown crimini mushrooms are the types most commonly found in stores in the United States, although shitake and portabella mushrooms are becoming more common.  Even some wild mushrooms are getting easier to find in some stores when they are in season. Technically, mushrooms are fungi, but are usually thought of as a vegetable for food purposes.

Mushroom caps are handy for stuffing. Raw mushrooms can hold spreads and dips, or they can be baked with other kinds of stuffings, such as seafood or cheeses mixed with herbs and spices.

Carb Profile Page for Portabella Mushrooms

Carbohydrate and Fiber Counts for White (Button) Mushrooms

  • ½ cup sliced or chopped raw white mushrooms: 1 gram of effective (net) carbohydrate and 8 calories
  • 1 medium white mushroom (3 medium mushrooms weigh about 2 oz): 0.5 gram of effective (net) carbohydrate and 4 calories
  • 4 oz mushroom (about 5 large mushrooms, 6 medium mushrooms, or 11 small mushrooms): 2.5 grams of effective (net) carbohydrate plus 1 gram of fiber and 25 calories

Glycemic Index for White Mushrooms

As with most non-starchy vegetables, there is no scientific study of the glycemic index of mushrooms.

More Information about the Glycemic Index

Estimated Glycemic Load of White Mushrooms

  • ½ cup sliced mushroom: 1
  • 1 medium mushroom: 0
  • 4 oz mushroom (¼ lb.): 2

More Information About the Glycemic Load

Health Benefits of White Mushrooms

White mushrooms are a very good source of copper, selenium, riboflavin, niacin, and pantothenic acid, and a good source of potassium. They also have been found to have high levels of some antioxidant compounds that may help prevent some cancers.

  There is also evidence of mushrooms having substances which boost the immune system and fight inflammation.

Selection and Storage of Mushrooms

White button and crimini mushrooms ideally should be purchased when the top is still attached to the stem -- once the gills begin to show, they are not as fresh and will begin to deteriorate more rapidly.  Avoid any mushrooms that have damp spots or discolorations.

Ideally, store mushrooms in a paper bag with perhaps a piece of slightly dampened paper towel inside.  Fresh mushrooms should keep at least several days in this state, as the air circulation through the paper bag helps to keep them from becoming soggy.  For the same reason, do not wash mushrooms until right before preparation for eating.

Low-Carb Recipes with Mushrooms

More Carb Profiles:


Grube BJ, Eng ET, Kao YC, et al. White Button Mushroom Phytochemicals Inhibit Aromatase Activity and Breast Cancer Cell Proliferation. Journal of Nutrition 131(12):3288-93 (2001).

Leroux, Marcus, Foster-Powell, Kaye, Holt, Susanna and Brand-Miller, Janette. "International table of glycemic index and glycemic load values: 2002." American Journal of Clinical Nutrition. Vol. 76, No. 1, 5-56, (2002).

Savoie JM, Minivielle N, Largeteau M. Radical-scavenging properties of extracts from the white button mushroom, Agaricus bisporus. Journal of the Science of Food and Agriculture, epub: February 5, 2008

USDA National Nutrient Database for Standard Reference, Release 28.

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