Mushroom Equivalents, Measures, and Substitutions

Convert measurements of mushrooms, from fresh to dried, and canned to cups



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Mushrooms add a wonderful earthiness to dishes, and with the many varieties available, bring interesting texture, flavor, and appearance to a recipe. When cooking with mushrooms, however, your recipe may call for this ingredient sliced or chopped, measured in cups; but if you are purchasing whole mushrooms, how will you know how much to buy? Good thing is, with a few simple conversions, you will be able to determine how many whole mushrooms are in a cup of chopped, as well as several other equivalents.

Mushrooms are one of those ingredients that are offered in many different forms: whole, sliced, chopped, dried, canned, and powdered. So when cooking a dish that includes mushrooms, there's a good chance you may not have the exact type of mushroom your recipe calls for. Luckily, there are some simple conversions—from weight to ​the number of mushrooms, weight to cups, dried mushrooms to fresh, and powdered mushrooms to fresh—you can make to swap out one kind of mushroom for another and figure out the amount you need.​

If you like mushrooms and tend to cook with them often, keep in mind you'll always have mushrooms on hand if you stock canned mushrooms, dried mushrooms, and powdered mushrooms in your pantry.

illustration showing fresh button mushroom conversions

The Spruce / Julie Bang

Converting Fresh Button Mushrooms

Button mushrooms, or white mushrooms, are the most common mushroom available (and are actually named "common mushroom"). They are sold packaged whole or sliced, and sometimes chopped, often by the pound or less. As with many vegetables and fruits, purchasing them whole is more affordable than cut up. But if your recipe calls for a number of mushrooms or cups of sliced or chopped—or even cooked—you need to know how many pounds of whole mushrooms to buy. You may also realize your recipe requires dried mushrooms while you only have fresh. Some simple conversions will make mushroom recipes a breeze.

1 pound of fresh button mushrooms equals:

  • 20 to 24 medium mushrooms
  • 5 cups sliced mushrooms
  • 6 cups chopped mushrooms
  • 2 cups sliced and cooked mushrooms
  • 2 cups cooked mushrooms
  • 3 ounces dried and reconstituted mushrooms

Converting Sliced and Canned

Whether you have sliced fresh mushrooms or canned mushrooms on hand, knowing what the equivalent is for your recipe will save you a trip to the store.

  • 8 ounces sliced fresh button mushrooms = 4 ounces drained canned sliced mushrooms
  • 8 ounces sliced fresh button mushrooms = 1 1/2 ounces dried mushrooms plus 3/4 cup boiling water
  • 1 (4-ounce) can whole button mushrooms = 3/4 cup mushrooms
  • 1 (4-ounce) can sliced button mushrooms = 3/4 cup mushrooms

Converting Dried and Powdered

Stocking your pantry with dried or powdered mushrooms is quite a convenience when you decide to make a mushroom dish last minute. Dried mushrooms are reconstituted and plump up to resemble fresh mushrooms while mushroom powder is employed in recipes to contribute the taste without the mushrooms' somewhat chewy texture (ideal for picky eaters). If a recipe lists fresh mushrooms, having the dried and powdered equivalents nearby will help you in a pinch.

  • 1 1/2 ounces dried mushrooms = 8 ounces sliced fresh
  • 1 1/2 ounces dried mushrooms = 4 ounces drained canned sliced mushrooms
  • 1 tablespoon powdered mushrooms = 3 tablespoons whole dried mushrooms
  • 1 tablespoon powdered mushrooms = 4 ounces fresh mushrooms
  • 1 tablespoon powdered mushrooms = 2 ounces canned mushrooms

Storing Fresh Mushrooms

While canned, dried, and powdered mushrooms will last a long time in the pantry, fresh mushrooms will only stay for about 1 week in the refrigerator. Instead of keeping the fresh mushrooms in their packaging, place them in a brown paper bag and store on a shelf in the fridge, instead of the vegetable drawer where there is too much moisture. You can also freeze fresh mushrooms, but you do need to cook them beforehand.