Is it necessary to refrigerate a buttermilk pie?

Here's why:

* Food safety: Buttermilk pie contains dairy products (milk, cream, eggs) which are highly perishable and can spoil quickly at room temperature. Refrigeration helps to slow down the growth of bacteria and keep the pie safe to eat.

* Texture and flavor: Refrigerating the pie allows the filling to set properly and helps to achieve the desired creamy, smooth texture. It also enhances the flavor by allowing the ingredients to meld together.

How long to refrigerate:

* A freshly baked buttermilk pie should be refrigerated for at least 4 hours before serving.

* Once refrigerated, it can be stored for 3-4 days in the refrigerator.

Important note: While refrigerating a buttermilk pie is the best way to preserve its quality, it's essential to ensure it's properly sealed in an airtight container to prevent any unwanted flavors from transferring.