Is sweet potato casserole bad if left out overnight?

It's not recommended to leave sweet potato casserole out overnight. While it might look fine, bacteria can grow rapidly at room temperature, potentially making it unsafe to eat.

Here's why:

* Food safety: The "danger zone" for bacterial growth is between 40°F and 140°F. Leaving sweet potato casserole at room temperature for an extended period can allow bacteria to multiply, potentially causing food poisoning.

* Spoilage: The casserole's ingredients, like dairy and sugar, are prone to spoilage, leading to unpleasant changes in taste, texture, and appearance.

Instead of risking it, consider these options:

* Refrigerate it: After it cools down, store the casserole in the refrigerator for up to 3-4 days.

* Freeze it: Freeze the casserole for up to 2 months. Reheat it thoroughly before serving.

Always err on the side of caution when it comes to food safety. If you're unsure about a dish, it's better to throw it out than risk getting sick.