These thick and chewy double chocolate brownies are extra fudgy, made with cocoa powder and chocolate chunks. They're filled with melty chocolate in every bite!
Preheat oven to 350º F. Prepare an 8-inch square baking dish with parchment paper or grease and flour well.
In a mixing bowl whisk together sugar, brown sugar and melted butter until smooth. Add eggs, egg yolk, oil and vanilla. Stir until well combined.
1 cup granulated sugar, ¼ cup brown sugar, ½ cup unsalted butter, 2 large eggs, 1 egg yolk, 3 Tablespoons vegetable oil, 1 teaspoon vanilla extract
Add cocoa powder, flour, cornstarch and salt and mix until it just comes together. Fold in ¾ cup of the chocolate chunks until evenly distributed.
¾ cup unsweetened cocoa powder, ½ cup all-purpose flour, 1 Tablespoon cornstarch, ½ teaspoon salt, 1 cup chocolate chunks
Spread batter onto prepared pan. Sprinkle the remaining chocolate chunks over the top. Bake for 25-30 minutes until the edges are set, and a tester comes out mostly clean.