Preheat the oven to 325°F. Line an 8-inch square baking pan with parchment paper then grease it with cooking spray.
In a large bowl, whisk together the eggs, vegetable oil, melted butter, vanilla extract and water.
In a separate medium bowl, whisk together the sugar, flour, cocoa powders, confectioners’ sugar and salt. Add the dry ingredients to the wet ingredients and mix just until combined.
Fold in the chocolate chips then pour the batter into the prepared baking pan.
Bake the brownies until they are just set in the center and a toothpick inserted comes out clean, 35 to 40 minutes. Remove the brownies from the oven then let them cool completely in the pan, then slice and serve.