From PackRat Recipe Wiki

The Egg Market provided cards available to purchase with eggs.

"This is a one-of-a-kind market filled with special-edition cards from the Easter Basket collection. You purchase cards in this market with the Eggs you collected during the PackRat Easter Egg Hunt. The market will only be available for a limited time, so be sure to spend your eggs before they hatch!"

Note that while the cards purchased from this market resemble Foil Cards, they are not actual foils -- they are commonly referred to as "Special Edition," "SE," or "faux foils". While they don't count for the foil feat, they do act like foils in that the special background disappears if you use the card in a recipe.

is the icon that represents the Easter Market.