Preheat your oven to 350°F (175°C). This ensures your brownies bake evenly and perfectly.

Grease a 9x9-inch baking pan with butter or line it with parchment paper. This will make removing the brownies from the pan a breeze once they’re baked.

In a large mixing bowl, combine the melted butter and brown sugar. Stir until well combined and smooth. Then, add the eggs and vanilla extract, mixing thoroughly until the batter is creamy and smooth.

In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt. Gradually add the dry mixture to the wet ingredients, stirring just until combined. Be careful not to overmix—this will help keep your brownies soft and chewy.

Gently fold the chocolate chips into the batter, ensuring they're evenly distributed throughout.

Pour the batter into the prepared pan, spreading it evenly with a spatula. Bake for 30–35 minutes or until a toothpick inserted into the center comes out with a few moist crumbs (not wet batter).

Once baked, allow the brownies to cool in the pan for about 10 minutes, then transfer them to a wire rack to cool completely before cutting into squares.