Your perfect cookies are at stake.

Were all guilty of skimming a recipe sometimes, or just plain missing a step.

Each category of baked goods requires various reactions activated by heat.

Photo of a person turning on their oven

Simply Recipes / Getty Images

Let’s take a look at what will happen in each case.

Have you ever noticed that not all recipes start out with preheating the oven?

Thats because the best time to preheat the oven depends on what youre making.

How to make Brazilian Cheese Bread in oven

Simply Recipes / Elise Bauer

A good recipe will indicate when to preheat the oven so it times out just right.

The inside of an oven with an oven thermometer on the baking rack

Simply Recipes / Irvin Lin