Preheat oven to 325°F. Line a baking sheet with parchment paper and set aside.
Using an electric hand mixer, beat the butter, brown sugar, and sugar together until light and fluffy, about 3 minutes. Scrape down the sides as needed.
1 cup unsalted butter, 1 cup dark brown sugar, ½ cup granulated sugar
Add in the eggs and mix until combined. Add in the vanilla and mix again. Set aside.
2 large eggs, 2 teaspoons pure vanilla extract
In a medium bowl, whisk the flour, baking soda, and salt together.
1¼ cups All Purpose Flour, ½ teaspoon Baking Soda, 1 teaspoon kosher salt
Add the dry ingredients to the wet ingredients and mix until just combined.
Fold in the oats and chocolate chips.
3 cups Old Fashioned Rolled Oats, 2 cups semisweet chocolate chips
Using a large cookie scoop (about ¼ cup), scoop the dough onto the prepared sheet pan, leaving 2 inches between the cookies.
Bake for 14-18 minutes until the edges of the cookies are golden and the centers are set. Let cool on the sheet pan for 3 minutes. Transfer to a wire rack to cool.