Preheat the oven to 350 degrees and line an 8x8-inch pan with parchment paper or lightly grease it with olive oil.

In a medium bowl, whisk together the olive oil, granulated sugar, and brown sugar until smooth.

Add the eggs and vanilla and whisk for one to two minutes until the mixture looks creamy and slightly lighter in color.

In a separate bowl, stir together the cocoa powder, salt, flour, and baking powder.

Add the dry ingredients to the wet ingredients and mix just until combined.

Pour in the hot coffee or hot water to loosen the batter and stir gently until smooth. 

Fold in the chocolate chips and spread the batter evenly into the prepared pan.

Sprinkle a few extra chocolate chips on top if desired.

Bake for 25 to 30 minutes until the center looks set and a toothpick comes out with moist crumbs.

Cool completely in the pan on a wire rack before slicing into squares.