Preheat oven to 325°F. Lightly spray an 8x8 baking pan with cooking spray and line it with parchment paper. Set it aside.
In a large bowl, whisk together sugar, butter and oil till it gets light and is very well combined using a hand mixer. About 2 minutes. (If you don't have a hand mixer, you can do this with a spatula. Just take your time to mix them together well.) Add in eggs next, one at a time and beat well after each addition. Then mix in water, espresso powder and vanilla.
¼ Cup Oil, ¼ Cup Butter, 2 Cups Confectioners' Sugar, 2 large Eggs, 2 Tablespoons Water, 1 teaspoon Espresso Powder, 1 teaspoon Pure vanilla extract
Now sift dry ingredients (flour, cocoa powder, chocolate chips, and salt.) over wet and fold them in to form brownie batter.
¾ Cup All purpose flour, ⅔ Cup Natural Unsweetened Cocoa powder, ½ Cup Chocolate chips, ¾ teaspoon Salt
Pour batter in pre lined pan and top with chocolate chips and chocolate chunks. You can also press in the toppings right after baking.
¼ Cup Chocolate chips, ¼ Cup Dark chocolate chunks
Bake them for about 40-45 minutes, or until a toothpick comes out with only a few crumbs attached. Allow them to Cool completely before slicing.