Preheat the oven to 350°F and line a square baking pan with parchment paper.
Melt the chocolate chips in the microwave in a heatproof bowl, mixing every 15 seconds until completely melted and smooth. Whisk the olive oil in and let the mixture cool slightly.
1 cup chocolate chips, ½ cup olive oil
In a stand mixer with the paddle attachment or in a large bowl with a whisk or hand mixer, whisk the sugar, brown sugar, eggs, egg white, and vanilla extract together on medium-high speed for 2-4 minutes until the color is pale.
1 cup sugar, ¼ cup brown sugar, 3 eggs, 1 egg white, 2 teaspoon vanilla extract
While whisking, pour the chocolate and oil into the egg mixture. Continue mixing until well combined.
Gently fold the all purpose flour, cocoa powder, and salt into the wet ingredients with a rubber spatula until no dry streaks of flour remain. Then fold in the chopped chocolate.
¾ cup all purpose flour, ½ cup cocoa powder, ½ teaspoon salt, 1 cup chopped chocolate
Pour the brownie batter into the prepared baking pan and smooth out the top. Bake for 25-30 minutes or until a toothpick inserted in the center comes out with some moist crumbs. Don't overbake!
Let the pan cool completely, cut the brownies into squares, and enjoy!