You you increase time or temperature if baking more than one item?

Here's why:

* Crowding the oven: When you bake multiple items at once, they compete for the heat in the oven. This means the oven temperature will drop slightly as the items absorb heat.

* Slower heat transfer: With more items in the oven, the heat needs to travel further to reach the center of each item, slowing down the cooking process.

How much to increase baking time:

* Slightly: For items close in size, you can add a few minutes to the original recipe's baking time.

* More significantly: For items of different sizes, you may need to increase the baking time by up to 10% or more.

Important tips:

* Use a baking thermometer: This will help you monitor the oven temperature and ensure it remains consistent.

* Rotate the items: Midway through the baking time, rotate the baking sheets or pans to ensure even cooking.

* Check for doneness early: Always check for doneness a few minutes before the suggested baking time to prevent over-baking.

Increasing temperature is generally not recommended because it can lead to uneven cooking and burning. It's better to adjust the baking time instead.