Preheat your oven to 350 degrees Fahrenheit. Line baking sheets with parchment paper and set aside.
In a stand mixer or in a large bowl with your hand mixer, cream together the butter and sugar for 3 to 6 minutes. The mixture should be light and fluffy.
1 cup unsalted butter, 1/2 cup granulated sugar
Mix in the vanilla extract.
1 teaspoon vanilla extract
Mix in the flour. Add all the flour at once, set the mixer to low, and as soon as you can mix the flour without it flying out of the bowl, turn the mixer up. Mix until the flour is just combined, being careful not to overmix. The mixture will be really crumbly at first and then it will come together as a dough.
2 cups all purpose flour
Stir in the pecans.
1/2 cup chopped pecans
Using a 1 1/2 tablespoon cookie scoop, scoop out the dough and roll into balls. Using a tumbler glass dipped in granulated sugar, press down the cookies until about 1/2 inch thick. You will need to re-dip the glass in sugar between cookies.
Bake for 16 to 18 minutes, rotating the baking sheet in the middle of baking. Bake until the cookies are just beginning to turn golden around the edges. (Be careful not to over-bake them.)
Remove the cookies from the oven. Allow them to cool for 2 minutes on the baking sheet before transferring them to a wire rack to cool completely.