Creating these delightful Black Cocoa Brownies is easy if you follow these clear steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C). Grease and line a 9×13-inch baking pan with parchment paper for easy removal.
2. Mix Wet Ingredients: In a large mixing bowl, combine the melted butter, granulated sugar, and brown sugar. Whisk until smooth.
3. Add Eggs: Add the eggs one at a time, mixing well after each addition. Then, stir in the vanilla extract.
4. Combine Dry Ingredients: In a separate bowl, sift together the flour, black cocoa powder, baking powder, and salt.
5. Mix Together: Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. Be careful not to overmix.
6. Add Extras: If desired, fold in the chocolate chips and nuts to give your brownies additional texture and flavor.
7. Pour into Pan: Spoon the batter into the prepared baking pan and spread evenly.
8. Bake: Place the pan in the preheated oven and bake for 25-30 minutes. A toothpick inserted in the center should come out with a few moist crumbs rather than clean.
9. Cool: Once baked, remove the pan from the oven and allow the brownies to cool in the pan for about 15 minutes before transferring them to a wire rack.
10. Cut and Serve: Once cooled, cut into squares or rectangles according to your preference.

Follow these simple steps and enjoy an incredible batch of black cocoa brownies that are sure to impress!