Quiche is a delicate mixture of eggs, heavy cream, milk, and various fillings, depending on the recipe. Its combination of ingredients make quiche tricky to reheat while maintaining its original flavors and freshness, but it can be done.
To successfully reheat quiche, you must first properly store it. Make sure it has cooled completely. Let it sit on the counter while cooling and don't cover it. After it has cooled, seal the top with plastic wrap. Store it in your refrigerator.
Preheat your oven to 350 degrees Fahrenheit. Remove the plastic wrap and heat the quiche for 10 to 15 minutes or until it is thoroughly warm. Reheat the quiche in a metal pan or in the original pan you baked it in.
You can cut the quiche into serving sizes before reheating it. This will ensure that the heat cooks in the center first, instead of the edges.
Make sure you reheat the quiche within three days of cooking it, or it will not be fresh and lose its original texture.
Don't reheat quiche in the microwave, or the texture will be soggy and wilted, and the crust will become soft rather than flaky.