Irish Trivia for the Day!What is Corned Beef? Corned Beef and Cabbage is a dish served on St. Patrick's Day but what is corned beef? It's a cut of beef (usually brisket or round steak) cured in a seasoned brine. A brine is a strong solution of water and salt. Sometimes spices are added to the brine. The word "corned" comes from the English use of the word "corn" meaning any small particle (such as the grains of salt used in the brine). Visit ehow.com to learn more about this traditional Irish dish.