Prep the browned butter and buttered pecans before making the cookie dough.
In a large skillet, preferably not a dark or non-stick pan so you can see when the butter browns, heat the butter over medium low heat.
Heat to a low simmer for approximately 10 minutes, swirling the pan occasionally, just until the butter forms brown bits. Remove from the heat and transfer to a mixing bowl to cool slightly.
To coat the pecans – in a large skillet, add the pecan halves and the 2 tablespoons of butter. Heat over medium until the butter melts and stir constantly. Remove from the heat after about 2 minutes or when you smell the nutty aroma. Allow to cool.
Preheat the oven to 350 degrees. Line a couple baking sheets with parchment and set aside.
In the bowl of a stand mixer, combine the sugar, brown sugar and browned butter. Cream until combined.
Add in the vanilla, egg and bourbon. Mix thoroughly, scraping down the sides often.
Add in the flour, soda, salt, cinnamon and cream of tartar. Mix well, scraping down the sides often.
Use a large ice cream scoop to divide out the cookie dough – place on the parchment lined baking sheets, leaving about 2 inches of space at minimum around each cookie.
Bake in the preheated oven for approximately 12-14 minutes or until the edges are beginning to brown and the center is set. Allow to cool.
Sprinkle with flaky sea salt prior to serving, if desired.
Notes
Cookies should be stored in an airtight container for up to 3 days.