How long should cornbread batter set up before baking?

Allowing cornbread batter to sit for a short period, such as 15 minutes, is beneficial because it gives the dry ingredients time to properly hydrate. This resting time allows the cornmeal to absorb moisture from the liquid ingredients, which can help in achieving a better texture and rise in the finished product.

During this time, the leavening agents also begin to activate, which can contribute to a fluffier and more tender cornbread. An appropriate resting period enhances the overall quality of the cornbread, ensuring it bakes evenly and achieves the desired flavor and consistency.

The other choices either suggest too short or too long a resting time, which may not provide the optimal benefits that a 15-minute rest offers for cornbread batter.