Preheat your oven to 350°F (175°C) to ensure even baking.
Grease your 8x8-inch baking pan or line it with parchment paper.
In a medium mixing bowl, combine the vegetable oil, unsweetened cocoa powder, granulated sugar, and salt. Whisk until smooth.
Add the eggs one at a time, whisking well after each addition, then stir in the vanilla extract.
Gently fold in the all-purpose flour with a spatula, being careful not to overmix.
Fold in the semi-sweet or milk chocolate chips until evenly distributed.
Pour the brownie batter into the prepared baking pan, spreading it evenly.
Bake for 20-25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Let the brownies cool in the pan for about 10 minutes before lifting them out using the parchment paper to cool completely before slicing.
