Preheat oven to 350°F. Line two baking sheets with parchment.
Beat butter and confectioners' sugar until fluffy, 2–3 minutes; blend in vanilla.
Whisk flour, salt, and cinnamon in a separate bowl.
Add dry ingredients to the butter mixture on low until a soft dough forms; fold in pecans.
Scoop 1-tablespoon portions, roll into balls, and place 2 inches apart on the sheets.
Bake 13–15 minutes, until set and lightly golden underneath.
Roll warm cookies in the coating sugar and transfer to a rack to cool.
Dust again with more sugar once cool for a snowy finish.