Factors for Soft Cookies:
1. Use of more fat: Higher fat content, like butter or shortening, leads to a softer texture.
2. Underbaking: Slightly underbaking cookies will keep them soft and chewy.
3. Use of brown sugar: Brown sugar contains molasses, which retains moisture and keeps cookies soft.
4. Adding cornstarch: A small amount of cornstarch helps to keep the texture soft by reducing gluten formation.
Factors for Crispy Cookies:
1. Use of less fat: Reducing the fat content makes the cookies more crisp.
2. Overbaking: Baking cookies for a longer time makes them crispier.
3. Use of white sugar: White sugar makes cookies spread more and become crispier.
4. Higher oven temperature: Baking at a higher temperature helps achieve a crisp texture.