In the bowl of a stand mixer, combine the softened butter, brown sugar and sugar. Cream with the paddle attachment until smooth and creamy.
Add the vanilla and mix well.
Add the flour, cinnamon and salt. Mix until combined, scraping the sides often.
Add the chopped pecans and mix well.
Press and shape the dough into an 8-10 inch long log, about 2 inches in diameter.
Wrap tightly in plastic wrap.
Chill in the fridge for about 4 hours or until firm.
Preheat the oven to 350 degrees. Line a couple baking sheets with parchment and set aside.
In a small bowl, combine the turbinado sugar and remaining chopped pecans.
Spread the pecan/sugar mixture in a baking dish or similar and roll the chilled dough in the mixture to cover the outside edge of the log.
Slice the dough log into ½ inch slices.
Place the cookie dough slices on the prepared baking sheets, leaving space between each cookie. Sprinkle with a little leftover pecan/sugar mix, if desired.
Bake in the preheated oven for 12-14 minutes or just until the center is set.
Notes
Storage: Shortbread cookies can be stored in airtight containers for up to 3 days.