Preheat your oven to 350°F (175°C). Grease an 8x8 inch baking pan or line it with parchment paper.
In a large bowl, combine the melted butter and granulated sugar. Whisk until well combined. Add the eggs and vanilla extract, and whisk until the mixture is smooth and slightly pale.
In a separate bowl, sift together the all-purpose flour, unsweetened cocoa powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined - be careful not to overmix.
Fold in the chocolate chips until evenly distributed throughout the batter, then pour it into the prepared baking pan and spread it evenly. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs - I highly recommend you check the brownies at the 20-minute mark. You want them to be set on the edges but still slightly gooey in the center for that perfect fudgy texture.
Once done, allow the brownies to cool completely in the pan before cutting them into squares. Enjoy!