If you double the ingredients in a recipe do need to cooking time?

Here's why:

* Heat distribution: The amount of heat needed to cook food is determined by the surface area exposed to heat. Doubling the ingredients doesn't significantly increase the surface area exposed to heat.

* Density: Doubling ingredients might increase the density of the dish slightly, but not enough to drastically affect cooking time.

* Conduction: Heat transfers through the food, so the center of the dish will still cook at roughly the same rate.

However, there are some exceptions:

* Dense Dishes: Dishes with a high density, like casseroles or meatloaf, might require a slightly longer cooking time when doubled. The center may take longer to reach the desired temperature.

* Oven Space: If your oven is already packed with food, doubling the ingredients might lead to uneven cooking. You may need to adjust the cooking time slightly to ensure everything cooks evenly.

* Specific Recipes: Some recipes specifically state adjustments to cooking time when doubling ingredients. Always read the recipe instructions carefully.

To ensure your dish cooks evenly, use a meat thermometer to check for doneness.

In general, doubling the ingredients will not significantly change the cooking time. You can usually just follow the original recipe's cooking time.