What is the difference between the panza de ratón and other wild mushrooms?

The panza de ratón (Lycoperdon perlatum) is distinguished by its globose or pear-shaped form without classic cap or stem, characteristic of gasteromycetes. Unlike the clavito or the tecomate, it has no visible gills and must be consumed exclusively when its interior is completely white. Its cooked flesh has an elastic and spongy texture similar to marshmallow, very different from the fibrous texture of other mushrooms.

What does the panza de ratón taste like?

It has a very mild flavour, slightly sweet and with a creamy vegetal background. The cooked texture is firm, elastic and spongy, comparable to firm tofu or marshmallow. It is neither bitter nor spicy. Its neutral flavour makes it an excellent vehicle for intense flavours such as chile guajillo, epazote, chile pasilla, onion, garlic and lard.

How is the panza de ratón served?

It is cut into slices or cubes and prepared roasted on the comal with salt and lime; stewed with epazote, garlic and onion; battered with egg and bathed in tomato sauce in the style of chiles rellenos; in mixiotes with chile guajillo; or in soups with maize dough. It must be consumed fresh, within two or three days of harvesting, and always before the gleba turns yellow.

Where does the panza de ratón originate from?

Lycoperdon perlatum is a cosmopolitan species present in temperate forests throughout the northern hemisphere. In Mexico, its main harvesting and consumption areas are the pine and oak forests of the central highlands: Puebla, Tlaxcala, the State of Mexico, Hidalgo, Veracruz and Michoacán, where it appears during the rainy season between July and October. It grows in pastures, forest clearings and areas with disturbed soil.

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Panza de ratón: wild mushroom from Puebla

What is it?

The panza de ratón, also known as bola de nieve, pedo de coyote or cuesco de lobo, is an edible wild mushroom belonging to the species Lycoperdon perlatum, a gasteromycete with a rounded or pear-shaped body that is harvested when young and its inner flesh is completely white. It takes its popular name from the resemblance of its rounded, soft form to the belly of a little field mouse. It grows in temperate pine and oak forests, in open pastures and disturbed areas of the central Mexican highlands, especially in Puebla, Tlaxcala, the State of Mexico, Hidalgo and Veracruz. Its harvesting coincides with the rainy season, from July to October, and must be carried out carefully: it is only edible when the interior is completely white, before the spores mature and it becomes powdery. It is one of the most characteristic wild mushrooms of the Mexican highlands and forms part of the traditional ethnomycological culinary repertoire.

Origin and history

The consumption of gasteromycete mushrooms, including the panza de ratón, is documented in Mesoamerica since pre-Hispanic times. Sahagún, in Book XI of the Florentine Codex, mentions various rounded mushrooms consumed by the Nahuas with names such as tlaltlacuit and others beginning with tlal- (of the earth) that could refer to species of Lycoperdon and related genera. The ethnomycologist Gastón Guzmán extensively described these species in his works on edible Mexican mushrooms, recording the regional names: panza de ratón in Puebla, bola de nieve in Tlaxcala, pedo de coyote in some Nahua communities, and cuesco de lobo in the Bajío. More recent ethnomycological research by Adriana Montoya, Felipe Ruan-Soto and Roberto Garibay Orijel has confirmed the cultural and economic importance of the panza de ratón in rural highland markets. CONABIO documents Lycoperdon perlatum as a cosmopolitan species widely consumed not only in Mexico but also in Europe, where it is called the common puffball. In Mexico, its harvesting remains a living tradition in peasant communities that know exactly the stage at which it must be gathered.

Characteristic ingredients

Lycoperdon perlatum is a gasteromycete fungus of the family Lycoperdaceae, whose fruiting body is globose to pear-shaped, with a size ranging between 3 and 7 centimetres in diameter. The outer surface is white or cream in young mushrooms, covered by small pointed warts or granules that fall off over time, leaving reticulated patches. The inner flesh (gleba) is completely white, firm and homogeneous when the mushroom is young, which defines its edibility. On maturing, the gleba turns into a yellowish-green or brown spore powder, at which point it is no longer edible. Harvesting requires distinguishing this juvenile stage exclusively. In the traditional cuisine of Puebla and Tlaxcala it is prepared sliced and roasted on the comal with salt and chilli, stewed with epazote and garlic, in mixiotes with chile guajillo or battered with egg and bathed in tomato sauce. In Hidalgo it is added to soups with maize dough and served as a side dish. Its flavour is very mild, slightly sweet, and its cooked texture is firm and elastic, similar to marshmallow.

Cultural significance

The panza de ratón is one of the most endearing wild mushrooms of the Mexican highlands and a symbol of the country's ethnomycological richness. Its harvesting is a seasonal activity that sustains women harvesters from Nahua, Otomi and Mazahua communities, who sell it fresh in regional markets such as those of Cholula, Atlixco, Huamantla, Apizaco, Tulancingo and Toluca during the rainy season. The wild mushroom fairs, cultural and gastronomic events held annually in towns such as Senguio, Ozumba, Tlaxco and San Juan de las Huertas, include the panza de ratón among the emblematic species of the season. It forms part of the rich ethnomycological heritage that sustains traditional Mexican cuisine, inscribed in 2010 by UNESCO as Intangible Cultural Heritage of Humanity. Ethnomycological studies published in the Revista Etnobiología have demonstrated the nutritional value of Lycoperdon perlatum, rich in protein, fibre and minerals, as well as its economic importance for the rural economies of the highlands and its role in the intergenerational transmission of knowledge about the use of forests.

Related recipes

Now that you know what it is, try cooking it at home with our step-by-step recipes:

Frequently asked questions

What is the difference between the panza de ratón and other wild mushrooms?: The panza de ratón (Lycoperdon perlatum) is distinguished by its globose or pear-shaped form without classic cap or stem, characteristic of gasteromycetes. Unlike the clavito or the tecomate, it has no visible gills and must be consumed exclusively when its interior is completely white. Its cooked flesh has an elastic and spongy texture similar to marshmallow, very different from the fibrous texture of other mushrooms.
What does the panza de ratón taste like?: It has a very mild flavour, slightly sweet and with a creamy vegetal background. The cooked texture is firm, elastic and spongy, comparable to firm tofu or marshmallow. It is neither bitter nor spicy. Its neutral flavour makes it an excellent vehicle for intense flavours such as chile guajillo, epazote, chile pasilla, onion, garlic and lard.
How is the panza de ratón served?: It is cut into slices or cubes and prepared roasted on the comal with salt and lime; stewed with epazote, garlic and onion; battered with egg and bathed in tomato sauce in the style of chiles rellenos; in mixiotes with chile guajillo; or in soups with maize dough. It must be consumed fresh, within two or three days of harvesting, and always before the gleba turns yellow.
Where does the panza de ratón originate from?: Lycoperdon perlatum is a cosmopolitan species present in temperate forests throughout the northern hemisphere. In Mexico, its main harvesting and consumption areas are the pine and oak forests of the central highlands: Puebla, Tlaxcala, the State of Mexico, Hidalgo, Veracruz and Michoacán, where it appears during the rainy season between July and October. It grows in pastures, forest clearings and areas with disturbed soil.