Melt the butter and allow it to cool for at least 15 minutes.
In a large bowl, combine the all-purpose flour, cake flour, baking powder, salt, and ground cinnamon. Set it aside.
Add the brown sugar, granulated sugar, and melted butter to the bowl of a stand mixer and mix for 3-4 minutes. Make sure to scrape the sides and bottom of the bowl.
Add the egg and egg yolk and mix until combined.
Combine the baking soda and two tablespoons of baking soda and add it to the butter mixture along with the vanilla extract.
Add the flour mixture to the butter mixture 1/2 cup at a time. Mix until it forms a cookie dough, and then fold in the chocolate chips and chopped pecans.
Refrigerate the cookie dough for a minimum of 3 hours but preferably overnight.
Line a baking sheet with parchment paper and preheat your oven to 350 degrees F.
Scoop 1 ½ tablespoons of the cookie dough onto your prepared baking sheet, spacing them about 3 inches apart.
Bake for 12-14 minutes. it's perfectly fine if the center is not completely set when you take them out of the oven. The cookies will set as they cool.
Serve warm and enjoy!