Preheat your oven to 350°F (175°C) to ensure even baking.
Line a 9x13 inch baking pan with parchment paper, leaving some overhang for easy removal.
In a large mixing bowl, combine the softened butter and packed brown sugar. Whisk until smooth and creamy, then add the eggs one at a time, mixing well. Stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, folding gently with a spatula until just combined.
Fold in the chocolate chips until evenly distributed.
Pour the batter into the prepared pan, spreading evenly. Bake for 25-30 minutes until edges are golden and a toothpick comes out with moist crumbs.
Let the brownies cool in the pan for about 10 minutes, then lift them out using the parchment paper and cool completely on a wire rack before cutting.
