Preheat oven to 350°. Spray a 9-inch square baking pan with baking spray and set aside.
In a small bowl, whisk flour, cocoa, baking powder and salt. Set aside.
In a large bowl with an electric mixer, beat the eggs and granulated sugar until light and fluffy (about 2 minutes). Add brown sugar, espresso powder and vanilla, continue to beat until combined. Slowly pour in the olive oil while continuing to beat, and then beat for another 2 minutes to combine.
Add dry ingredients to wet ingredients, folding gently until combined. Fold in ¼ cup chocolate chips.
Pour batter into prepared baking pan. Sprinkle top with remaining ¼ cup chocolate chips.
Bake for 15 to 18 minutes, or until a toothpick inserted comes out with moist crumbs. (Be careful not to over bake to ensure a moist, fudgy brownie!)