Do you have to refrigerate an apple pie?

Here's a breakdown:

* Freshly baked apple pie: Yes, you should refrigerate it. A fresh apple pie has a high moisture content from the filling, making it susceptible to bacteria growth at room temperature. Refrigerate it to ensure safety and quality.

* Store-bought, already-baked apple pie: Check the instructions on the packaging. Some store-bought pies are designed for longer shelf life and can be left at room temperature for a few days. Others might need refrigeration.

* Apple pie filling: Yes, refrigerate it. Apple pie filling is a good breeding ground for bacteria without refrigeration.

In general, it's always best to err on the side of caution and refrigerate any apple pie, especially if it's homemade or you're unsure about its storage instructions.