Chilling cookie dough before baking generally results in thicker, chewier, and more flavorful cookies due to better hydration of the flour and a slower spread in the oven.
Chilling cookie dough offers several key benefits that impact the final cookie:
Hydration: During chilling, the flour in the dough has more time to fully absorb the liquid ingredients (eggs, milk, etc.). This complete hydration leads to a more cohesive dough structure.
Flavor Development: Chemical reactions occur over time, enhancing the flavors in the dough. The longer the dough chills, the more pronounced these flavors become, resulting in a richer, more complex taste.
Reduced Spreading: Chilling solidifies the fats in the dough. This means that when the cookies bake, the fat melts more slowly, preventing the cookies from spreading out too thin. The result is a thicker, chewier cookie.
Controlled Browning: Slower spreading also contributes to more even browning. The cookies bake more uniformly, preventing overly browned edges and underbaked centers.
Don't chill your cookie dough for too long! While chilling is beneficial, excessively long chilling times (over 72 hours) can sometimes dry out the dough, leading to crumbly cookies. Aim for a chilling time between 30 minutes and 48 hours for optimal results.