Start by preheating your oven to 325°F (160°C). This is important because having a properly heated oven helps the cookies bake evenly and achieve that lovely golden edge.
Line your baking sheets with parchment paper. This ensures that the cookies won't stick and makes cleanup a breeze. Using parchment paper can also help the cookies bake more evenly.
In a large mixing bowl, combine ¾ cup unsalted butter and 1½ cups brown sugar. Using a stand mixer or hand mixer, beat at medium speed until the mixture becomes light and fluffy, about 2 minutes. This step is crucial because it helps to incorporate air, giving your cookies a light texture.
Add 1 egg and 2 teaspoons vanilla extract to the butter and sugar mixture. Beat for another minute until well combined. The egg adds moisture and helps with the binding.
Next, in another bowl, whisk together 1½ cups all-purpose flour, ½ teaspoon baking soda, ½ teaspoon baking powder, and ½ teaspoon salt. Gradually add this dry mixture to the wet ingredients, mixing until just combined. Be careful not to overmix; you want the dough to be just blended.
Now, gently fold in 2¼ cups old-fashioned oats. The mixture will seem a bit tacky but should still be manageable. If it feels too sticky to handle, add a tablespoon of flour at a time until it’s workable.
Roll the dough into balls measuring between 1 to 1½ inches. As you roll, you’ll notice the delightful texture of the oats. Place these dough balls on the prepared cookie sheet, spacing them about 2 inches apart. This space allows them to spread while baking.
Slide the baking sheets into your preheated oven and bake for about 10 to 14 minutes. You’ll know they’re ready when the edges turn a light golden brown and the centers are set but still soft. The aroma wafting through your kitchen will be hard to resist!
Once done, remove the cookies from the oven and let them cool on the sheet for a few minutes before transferring them to a wire rack. This cooling process allows the cookies to firm up, ensuring they don’t fall apart when you move them.