button mushroom
US /ˈbʌt.ən ˌmʌʃ.rʊm/
UK /ˈbʌt.ən ˌmʌʃ.rʊm/

1.
champignon, fungo prataiolo
a common edible mushroom (Agaricus bisporus) with a short stem and a cap that is initially rounded and white or light brown, often used in cooking
:
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She added sliced button mushrooms to the stir-fry.
Ha aggiunto funghi champignon affettati al soffritto.
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The recipe calls for fresh button mushrooms.
La ricetta richiede funghi champignon freschi.