Does it really matter if your cookies are uniform in size when baking?
Cookie sizes can seem arbitrary, especially when you’re making a batch for your eyes only. But keeping your cookies consistent isn’t about uniformity in appearance, it’s more about baking.
Think of it this way: Different sized cookies require different baking times. If you place giant cookie dough pieces next to bite-sized pieces, smaller ones cook faster (via Kitchn). For the most impatient bakers, such speed might sound like good news — it means you’ll have cookies sooner! But if you take the tray out when the small cookies are ready, the bigger ones won’t be baked yet; You will have golden edges with raw centers. Meanwhile, if you choose to leave the baking sheet in the oven, the larger cookies will continue to bake perfectly, while the smaller ones will likely burn.
To prevent this from happening, Quaker Oats recommends shaping cookie dough with the same utensil, whether it’s an ice cream scoop, teaspoon, or tablespoon. Eyeball sizes can only be so precise, so it’s best to forego hand rolling for a more calculated approach to ensure your cookies not only look great, but also perfectly and evenly baked.