Rocky Mountain oysters

Rocky Mountain oysters, also known as prairie oysters, are a North American culinary name for edible offal, specifically buffalo or bull testicles. They are usually peeled, coated in flour, pepper and salt, sometimes pounded flat, then deep-fried. This delicacy is most often served as an appetizer. It is a well-known novelty dish in parts of the American West and the Canadian Prairies where cattle ranching is prevalent and castration of young animals is common (“prairie oysters” is the preferred name in Canada, where they may be served in a demi-glace, not deep-fried). In Oklahoma and North Texas, they are sometimes called calf fries but only if taken from very young bulls.