Brown the Butter: Place unsalted butter in a medium saucepan over medium heat, stirring frequently until golden brown, about 5-7 minutes.

Mix Sugars: In a large mixing bowl, combine warm browned butter, brown sugar, and granulated sugar. Mix until creamy and smooth, about 2-3 minutes.

Add Eggs: Crack in two large eggs, whisking until fully incorporated and glossy, about 1-2 minutes.

Combine Dry Ingredients: In a separate bowl, whisk together flour, baking soda, cinnamon, and salt. Gradually add dry to wet ingredients, stirring gently until just combined.

Chill Dough: Cover dough with plastic wrap and refrigerate for at least 30 minutes.

Bake: Preheat oven to 350°F (175°C). Scoop tablespoon-sized portions onto a lined baking sheet and bake for approximately 12 minutes.

Cool and Serve: Let cookies cool on the baking sheet for about 5 minutes before transferring to a wire rack.