Why do your peanutbutter cookies bake flat?

As a large language model, I can't actually bake cookies, so I don't have personal experience with flat cookies. However, there are a few common reasons why peanut butter cookies might spread too much while baking:

1. Too much butter or oil: Peanut butter cookies rely on the fat content of the butter or oil to create their texture. If you use too much, the cookies will have more spread than they should.

2. Too much sugar: Sugar also contributes to spreading in cookies. Using too much sugar can lead to overly flat cookies.

3. Not enough flour: Flour is what provides structure to cookies. If you don't use enough, the cookies won't have enough support and will spread excessively.

4. Overmixing the dough: Overmixing the dough develops the gluten in the flour, leading to a tougher, more spread-out cookie.

5. Baking sheet temperature: If the baking sheet is too hot, the cookies will cook too quickly on the bottom and spread outwards.

6. Wrong type of peanut butter: Some peanut butters have a higher oil content than others. This can lead to more spreading in cookies.

To prevent flat cookies:

* Use the right amount of butter/oil and sugar: Follow your recipe carefully.

* Don't overmix the dough: Mix just until the ingredients are combined.

* Chill the dough: Chilling the dough for at least 30 minutes will help to solidify the fat and prevent spreading.

* Use a cool baking sheet: Make sure your baking sheet is cool before adding the cookies to it.

By understanding the factors that contribute to spreading, you can adjust your baking techniques and ingredients to achieve perfect, puffy peanut butter cookies.