Petits fours, those dainty and fancy bite-size cakes, are ideal classy dessert for special occasions. Petits fours may have a variety of icings and fillings to make them into the elaborate little cakes that fill a dessert tray. After making these tiny confections ahead of time, save petits fours with careful storage. Your storage method depends upon the icing and fillings incorporated into your petits fours.
Leave each petit four sitting on a rack at room temperature until the icing over the outside edge of the cake hardens completely -- about one hour.
Transfer the petits fours to the plastic container after the icing sets completely. Place each petit four into the container in a single layer, leaving a small space between each cake so they do not touch each other in the container.
Seal the container tightly.
Place petits fours into the refrigerator if they contain perishable ingredients such as whipped cream or custard. Keep the petits fours in the refrigerator for two to three days. Petits fours without perishable ingredients can stay at room temperature in the sealed container for up to five days.
Freeze petits fours in the plastic container if they do not have fondant, whipped cream or custard ingredients. Place the sealed container into the freezer and save the petits fours there for up to one month.