Preheat your oven to 350°F (175°C) while preparing a 9×13-inch baking pan. Grease lightly or line with parchment paper.

In a medium saucepan over medium heat, melt 1 cup of unsalted butter until it turns golden brown and emits a nutty aroma, about 5-7 minutes. Let it cool slightly.

In a large mixing bowl, whisk the browned butter, 1 cup white granulated sugar, and ¾ cup light brown sugar until smooth. Add 2 large eggs and 2 teaspoons of vanilla extract; mix until glossy.

In another bowl, stir together 2½ cups all-purpose flour, 2 teaspoons baking powder, and ½ teaspoon salt. Gradually fold these dry ingredients into the wet mixture until a soft dough forms.

Transfer the dough into the prepared baking pan, spreading it evenly. Mix ¼ cup granulated sugar with 1 teaspoon ground cinnamon and sprinkle over the dough.

Bake for 20-25 minutes or until edges are golden brown and a toothpick inserted comes out clean. Let cool in the pan for 10 minutes before transferring to a wire rack to cool completely.