Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a medium saucepan, brown the butter: cook over medium heat until it melts and begins to foam. Continue cooking until it turns a deep golden brown and smells nutty, about 5-7 minutes. Remove it from heat and let it cool slightly.

In a large bowl, combine the brown butter, brown sugar, and granulated sugar using a whisk until well blended.

Add the egg and vanilla extract, mixing until incorporated.

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

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

In a small bowl, mix together the granulated sugar and cinnamon for the topping.

Using a cookie scoop or tablespoon, form the dough into balls and roll them in the sugar-cinnamon mixture.

Place the balls on the prepared baking sheets, spaced about 2 inches apart.

Bake in the preheated oven for 10-12 minutes or until the edges are golden, but the centers appear soft.

Let the cookies cool on the sheets for a few minutes before transferring them to a wire rack to cool completely.