One-Bowl Brownies are chewy, fudgy, chocolatey and seriously the best brownies you'll ever have! Quick and easy to make in one bowl and less than 10 minutes of prep time, you'll never go back to a box mix again.
Line a 9 x 13 baking pan with foil, allowing about an inch of overhang over sides. Spray foil with cooking spray.
In a large microwaveable bowl, microwave butter and unsweetened chocolate bars on HIGH for about 2 minutes or until butter is melted. Remove from oven and stir until chocolate is completely melted.
Add sugar and stir.
Add eggs and vanilla and stir until blended.
Add flour and dark chocolate chips.
Mix well and pour into prepared pan and bake in a 350 F oven for about 30 to 35 minutes or until a toothpick inserted in center comes out with fudgy crumbs. DO NOT OVERBAKE.
Remove from oven and let cool completely. Using foil handles, remove brownies from pan and cut into servings.