01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium saucepan, melt the butter over medium heat. Stir frequently until the butter foams, turns golden brown, and smells nutty—about 4–5 minutes. Remove from heat and let cool for 5 minutes.
03 - In a large bowl, whisk together flour, baking soda, salt, and cinnamon.
04 - In a separate large bowl, combine browned butter, brown sugar, and granulated sugar. Beat until well combined and smooth.
05 - Add eggs, one at a time, beating well after each addition. Stir in the vanilla extract.
06 - Gradually add the dry ingredients to the wet mixture, mixing just until incorporated.
07 - Fold in chocolate chips and optional nuts.
08 - Scoop dough with a tablespoon or cookie scoop and place on prepared baking sheets, spacing about 2 inches apart.
09 - Bake for 10–12 minutes, or until edges are golden and centers still look slightly underbaked.
10 - Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.