Start with making the brown butter. Heat butter in a saucepan on medium heat, first it will melt then it will foam. Continue stirring for the next 5-8 minutes. You'll know it's ready when the bits on the bottom of the pan become golden brown and a nutty aroma has filled the room. Transfer into a glass cup and allow to cool to room temperature.
3/4 cups butter
In a large bowl, whisk together cooled brown butter and brown sugar for 2 minutes. Add in egg and vanilla and continue whisking until smooth.
3/4 cups brown sugar, 1 tbsp vanilla, 1 egg
Add in flour, baking soda, cinnamon, and salt. Fold in gently using a spatula until just combined.
2 cups all-purpose flour, 1 tsp baking soda, 1 tsp cinnamon
Add in chopped pecans and dark chocolate chips.
3/4 cups pecans, 2/3 cups dark chocolate chips
Roll the cookies into 9 even balls and press down gently to form an oval shape. Place them into the fridge to chill for minimum 1 hour.
Preheat the oven to 350°F. Bake the cookies 4-5 at a time for 10 minutes. Allow to sit on the baking tray for an additional 5 minutes, then transfer onto a cooling rack to set.
Cookies are best eaten fresh! Leave on the counter for 2-3 days. Enjoy!