As an expert sommelier and brewer, I can confidently say that refrigerating a pineapple upside down cake after baking is not necessary, but it can be done if desired.
When you bake a pineapple upside down cake, the heat from the oven causes the cake to rise and the pineapple and cherries (if using) to caramelize, creating a deliciously sticky and sweet topping. Once the cake is done baking, it is important to allow it to cool slightly before attempting to remove it from the pan.
During the cooling process, the cake will naturally pull away from the sides of the pan. To ensure a clean release, it is recommended to run a knife around the edges of the pan and gently push the cake away from the sides before turning it over onto a platter. This will help prevent any sticking and ensure that the cake comes out intact.
If the pineapple and cherries (if using) happen to stick to the bottom of the pan when you remove it, don't worry! Simply use a butter knife to gently scrape them out and rebuild the topping on the cake. This can be a fun and creative process, as you can arrange the pineapple slices and cherries in any pattern you desire.
Now, back to the question of refrigerating the pineapple upside down cake. The answer depends on personal preference and the specific circumstances. If you plan to serve the cake immediately or within a few hours, there is no need to refrigerate it. The cake will stay moist and flavorful at room temperature for several hours.
However, if you anticipate that the cake will sit out for an extended period or if you live in a particularly warm climate, refrigeration can help prolong its freshness. Simply cover the cake with plastic wrap or place it in an airtight container before refrigerating. When you are ready to serve, allow the cake to come to room temperature before enjoying.
It's worth mentioning that refrigeration can slightly alter the texture of the cake. The cold temperature can make the cake firmer and denser, so keep that in mind if you prefer a lighter and fluffier texture.
In my personal experience, I have found that pineapple upside down cake tastes best when it is served at room temperature. The flavors seem to be more pronounced and the cake has a softer texture. However, if you have leftovers or need to store the cake for an extended period, refrigeration can help maintain its freshness.
To summarize, refrigerating a pineapple upside down cake after baking is not necessary but can be done if desired. The cake can stay at room temperature for several hours without any issues, but refrigeration can help prolong its freshness if needed. Ultimately, it comes down to personal preference and the specific circumstances in which the cake will be served.