Letters on egg cartons
USDA
The USDA grades eggs into three categories for consumers: AA, A, and B. The grade is determined by the interior quality of the egg and the appearance and condition of the shell.
- USDA Grade AA eggs have whites that are thick and firm; yolks that are high, round, and practically free from defects; and clean, unbroken shells. These highest-quality eggs are deemed best for frying and poaching.
- USDA Grade A eggs are similar to Grade AA eggs except that the whites are reasonably firm. These eggs are often used in baking and other cooking applications.
- USDA Grade B eggs have whites that may be thinner and yolks that may be wider and flatter. The shells are unbroken, but may be stained. These eggs are usually used to make liquid, frozen and dried egg products, and are seldom seen in retail stores.