Creating this Chocolate Brownie Cake is easier than you might think. Just follow these straightforward steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C) and prepare a 9×13-inch baking pan by greasing it or lining it with parchment paper.
2. Melt Butter: In a medium saucepan, melt the unsalted butter over low heat. Once melted, remove it from the heat and let it cool slightly.
3. Mix Sugars: Stir in the granulated sugar into the melted butter until well combined.
4. Add Eggs: Add eggs, one at a time, mixing well after each addition. Then stir in the vanilla extract.
5. Combine Dry Ingredients: In a separate bowl, sift together the flour, cocoa powder, baking powder, and salt.
6. Combine Mixtures: Gradually fold the dry mixture into the wet ingredients until just combined. Be careful not to overmix.
7. Add Chocolate Chips: If you’re using chocolate chips, gently fold them in at this point for an extra chocolatey experience.
8. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
9. Bake: Place the pan in the preheated oven and bake for 30-35 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.
10. Cool: After baking, remove the pan from the oven and allow the cake to cool in the pan for about 15-20 minutes. Remove it from the pan and let it cool completely on a wire rack.
11. Dust with Sugar: Once the cake is cool, dust the top lightly with powdered sugar if desired before serving.

By following these steps carefully, you’ll find success in your baking adventure!