Preheat oven to 350°F. Line a baking sheet with parchment paper and set aside.
In a large mixing bowl, using a hand mixer, beat the butter, sugar, vanilla and milk together until smooth, about 2 minutes.
1 cup unsalted butter, ½ cup granulated sugar, 2 teaspoons pure vanilla extract, 1 tablespoon milk
Slowly add in half of the flour, beating until it is well combined. It will be a thick dough.
2 cups all-purpose flour
Add in the remaining half of the flour. Once the dough is well mixed and soft, stir in the chopped pecans.
¾ cup chopped pecans
Scoop or use a large spoon, measure dough and shape into balls, about 1 inch in size. Place on the prepared baking sheet. You can leave them as they are, or gently press them with the bottom of a lightly floured glass to flatten the tops. Bake for about 13-15 minutes, until the bottoms of the cookies are light golden brown.
Remove the cookies from the oven and allow them to cool slightly, then transfer to a wire rack to cool completely.. Once they have cooled, they will be slightly firm.
Fill a large Ziplock bag with powdered sugar and toss the cookies in the sugar until they are completely coated. Top with chopped pecans if desired.
¾ cup powdered sugar