Colorado Department of Agriculture
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Eggs

Picture of question mark key from keyboard with the words Frequently Asked Questions

Close up on white eggs in a carton
  1. What do the different egg grades mean?
  2. How important is freshness?













One

  1. WHAT DO THE DIFFERENT EGG GRADES MEAN?

    Grade AA
    The AA egg will stand up tall. The yolk is firm and the area cover by the white is small. There is a large proportion of thick white to thin white.

    Graphic of an AA egg

    Grade A
    The A egg cover a relatively small area. The yolk is round and upstanding. The thick white is large in proportion to the thin white and stands fairly will around the yolk.

    Graphic of an A egg

    Grade B
    The B egg spreads out more. The yolk is flattened and there is about as much or more thin white as thick white.

    Graphic of a B grade egg


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    Two

  2. WHAT SIZES DO EGGS COME IN?

    Eggs sizes are Jumbo, Extra Large, Large, Medium, Small and Peewee. Medium, Large and Extra Large are the most common eggs.


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    Three

  3. HOW IS THE SIZING DETERMINED?

    Sizes are classified according to minimum net weight expressed in ounces per dozen.


    EGG SIZE

    OZ. PER DOZEN

    Jumbo 30
    Extra-Large 27
    Large 24
    Medium 21
    Small 18
    Peewee 15

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    Four

  4. HOW DO I READ THE CARTON EXPIRATION DATE?

    Egg cartons from USDA-inspected plants must display a Julian date - the date the eggs were packed. Though not required, they may also carry an expiration date beyond which the eggs should not be sold. IN USDA-inspected plants, this date can not exceed 30 days after the pack date. It may be less through choice of the packer or quantity purchaser such as your local supermarket chain. Plants not under USDA inspection are governed by laws of their states.

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    Five

  5. WHAT IS A JULIAN DATE?

    Starting with January 1 as number 1 and ending with December 31 as 365, these numbers represent the consecutive days of the year. This numbering system is sometimes used on egg cartons to denote the day the eggs are packed. Fresh shell eggs can be stored in their cartons in the refrigerator for 4 to 5 weeks beyond this date with insignificant quality loss.


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    Six

  6. HOW IMPORTANT IS FRESHNESS?

    As an egg ages, the white becomes thinner and the yolk becomes flatter. These changes do not have any great effect on the nutritional quality of the egg or its functional cooking properties in recipes. Appearance may be affected though. When poached or fried, the fresher the egg, the more it will hold its shape rather than spread out in the pan. On the other hand, if you hard cook eggs that are at least a week old, you'll find them easier to peel after cooking and cooling than fresher eggs.


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    Seven

  7. HOW SHOULD EGGS BE STORED?

    It is best to store eggs on an inside shelf in the refrigerator. The carton keeps the eggs from picking up odors and flavors from other foods and helps prevent moisture loss. Fresh uncooked eggs can be kept in the carton for at least 4 to 5 weeks beyond the pack date.


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    Eight

  8. WHERE CAN I GET MORE INFORMATION?

    You can contact our office for more information or the American Egg Board website.


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