Preheat oven to 325°F. 

Lightly spray an 8 x 8 baking dish with cooking spray and line with parchment paper. 

In a medium bowl, combine the sugar, flour, cocoa powder, powdered sugar, chocolate chips, and salt. 

In a large bowl, whisk together the eggs, oil, water, and vanilla. 

Sprinkle the dry mixture into the wet mixture slowly, stirring until combined.

Pour the mixture until the pan and use a spatula to smooth the top. 

Bake for 40-48 minutes or until a toothpick inserted into the center comes out clean. 

Cool completely before slicing.