What is the controlled variable for chocolate chip cookies?

There isn't a single "controlled variable" for chocolate chip cookies. That's because "controlled variable" is a term used in experiments to describe the factors you keep the same across different test groups.

Instead, when baking cookies, you might have several controlled variables depending on the experiment you're running. Here are a few examples:

* Recipe: If you're testing different types of chocolate chips, you'd want to keep the rest of the recipe (flour, sugar, butter, etc.) consistent.

* Baking time and temperature: To compare different cookie sizes or ingredients, you'd want to bake them at the same temperature for the same amount of time.

* Baking sheet: Using the same type of baking sheet ensures consistent heat distribution across all your cookies.

* Oven: Using the same oven (or even the same rack within the oven) helps minimize variations in heat.

So, when baking chocolate chip cookies, the controlled variables depend on the specific experiment you're conducting. You control those variables to ensure that the only difference between your test groups is the factor you are actually trying to study.