Start by browning the butter. In a saucepan over medium heat, melt the butter. Continue cooking until it turns a golden brown and has a nutty aroma, about 5-7 minutes. Let it cool slightly.

Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine the brown butter, brown sugar, and granulated sugar. Whisk until smooth.

Add the eggs one at a time, followed by the vanilla extract. Mix well.

In another bowl, whisk together the flour, baking soda, ground cinnamon, and salt.

Gradually add the dry ingredients to the wet mixture, stirring until just combined.

If using, fold in the chocolate chips and chopped nuts.

Drop spoonfuls of the cookie dough onto a baking sheet lined with parchment paper, leaving space in between them.

Bake for 10-12 minutes, or until the edges are golden brown but the centers remain soft.

Once out of the oven, let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.