Toast Pecans: In a dry skillet over medium heat, toast pecans for 3-5 minutes until fragrant. Let cool completely.
Prep Oven: Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
Cream Butter & Sugar: In a large bowl, cream together the softened butter, ½ cup of powdered sugar, vanilla, and salt until light and fluffy.
Combine Ingredients: On low speed, mix in the flour until just combined. Fold in the cooled, toasted pecans.
Chill Dough: Wrap dough in plastic wrap and chill for at least 30 minutes. This is essential to prevent spreading.
Shape Cookies: Roll dough into 1-inch balls and place them 1-2 inches apart on the prepared baking sheets.
Bake: Bake for 12-15 minutes, until the bottoms are lightly golden.
First Sugar Roll: Let cookies cool for 5 minutes on the baking sheet, then roll the warm cookies in the remaining 1 cup of powdered sugar.
Cool Completely: Transfer cookies to a wire rack to cool completely.
Second Sugar Roll: Once fully cooled, roll the cookies in powdered sugar again for a thick, snowy finish.