You might succeed in this if you keep the cake in an tightly airtight container. However, it seems likely that it will still lose some crispness if you do this - a better way would be to put it in a really hot oven for 5-7 minutes before you serve it (if this is possible, depending on the type of the cake. Clearly this depends a lot on the types of filling/icing on the cake). If reheating the cake is not an option, try putting some packets of silicone packing gel (the little sachets used to keep household items from becoming damp) into the airtight cake container, making sure they do not come into contact with the cake. This should help maintain crispness.
Store in an airtight container. If the meringue is too big for that, wrap tightly in clingfilm and refrigerate.
Wrap and refrigerate, or freeze
skills
A frosted cake may be covered with a large bowl or basin, or with plastic film, wax paper or aluminum foil. When using film, foil or wax paper, it is helpful to insert several toothpicks in the top of the cake to keep the wrapping from touching the frosting.
Refrigerate it.
Put ice in it, or refrigerate it.
Nitrogen
Refrigerate as soon as they are bought.
Refrigerate Cakes With Fruit Do you have to refrigerate cake if it has fruit in it? It is generally recommended to refrigerate cakes that contain fruit, especially if the fruit is fresh. Fresh fruit can spoil quickly if left at room temperature, and this can cause the cake to spoil as well. Additionally, refrigeration can help to extend the shelf life of the cake and keep it fresher for longer. However, it is important to note that not all cakes with fruit need to be refrigerated. If the fruit is candied or dried, for example, the cake may be able to be stored at room temperature. Similarly, if the fruit is incorporated into a cake filling or frosting, rather than being mixed into the batter, the cake may not need to be refrigerated. In general, it is best to err on the side of caution and refrigerate cakes with fruit to ensure that they remain fresh and safe to eat.ʰᵗᵗᵖˢ://ʷʷʷ.ᵈᶦᵍᶦˢᵗᵒʳᵉ²⁴.ᶜᵒᵐ/ʳᵉᵈᶦʳ/⁴⁶¹⁴⁸⁰/ᴷᵘᵐᵃʳᴾᵃˢʷᵃⁿ/
Nitrogen
To keep germs from growing and multiplying
Freeze or refrigerate it.