Ubre Blanca (c. 1972–1985) was a cow in Cuba known for her prodigious milk production. The cow, along with the "Cordón de La Habana" coffee plantations, the Voisin pasture system, and the microjet irrigation system, symbolized Fidel Castro's efforts to modernize Cuba's agricultural economy.^{[citation needed]} The Spanish phrase ubre blanca translates to the English phrase "white udder."

Ubre Blanca produced 109.5 liters (241 lb) of milk on a single day in January 1982 – more than four times a typical cow's production. The cow also produced 24,268.9 liters (around 55,090 lb) of milk in one lactation period ending in February 1982.^[1] Both feats were recognized by Guinness World Records as world records; either record wouldn't be beaten by another cow until after Ubre Blanca's death.^[2][3] The cow was a cross between a Holstein and a zebu.^[4]

Castro referred to Ubre Blanca's prodigious output in speeches as evidence of communism's superior breeding skills, and the cow's achievements were often printed in Cuban newspapers.^[5] To many Cubans, Ubre Blanca evokes memories of the era before the so-called "Special Period" – the economic collapse that followed the demise of the Soviet Union, Cuba's main benefactor, beginning in 1989.^{[citation needed]}

In 1985, Ubre Blanca was euthanized around the age of 13 (the exact age is unknown).^[6] The cow's death was commemorated by Communist Party newspaper Granma with a full obituary and eulogy. Taxidermists stuffed Ubre Blanca and put the body in a climate-controlled glass case at the entrance to the National Cattle Health Center, a 45-minute drive from old Havana, where it still remains. Ubre Blanca was honored by her hometown of Nueva Gerona, which erected a marble statue in memory of the cow.^[7] Since the cow's death, Cuban scientists have unsuccessfully attempted to clone Ubre Blanca using frozen tissue samples.^[1][4][8]

In the poem Ganadería, Cuban exile and poet Ricardo Pau-Llosa retells the story of Ubre Blanca as an allegory of Castro's rise to power.^{[9][failed verification]}

They were educated men,
how could they not know what was coming?
How could they not save Ubre Blanca
from the endless speeches, the cameras, and the fist?

• Agriculture in Cuba
• Fidel Castro and dairy