Creating your Brownie Cake is straightforward. Follow these easy steps to ensure a perfect bake:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13-inch baking pan.
2. Melt Butter: In a medium saucepan over low heat, melt the butter. Remove from heat and let it cool slightly.
3. Mix Sugar and Eggs: In a large bowl, combine the melted butter and granulated sugar. Stir well, then add the eggs one at a time, mixing thoroughly after each addition. Add the vanilla extract and mix until smooth.
4. Combine Dry Ingredients: In another bowl, sift together the flour, cocoa powder, baking powder, and salt.
5. Combine Mixtures: Gradually add the dry mixture to the wet ingredients, stirring until just combined. Be careful not to overmix.
6. Add Chocolate Chips: Fold in the chocolate chips if you’re using them for added richness.
7. Pour Batter: Pour the batter into the prepared baking pan, spreading it evenly.
8. Bake: Bake in the preheated oven for 25-30 minutes. Check for doneness by inserting a toothpick in the center; it should come out with a few moist crumbs.
9. Cool: Remove from the oven and let the cake cool in the pan for about 15-20 minutes. Then transfer it to a wire rack to cool completely.
10. Serve: Once cooled, slice the cake into squares or rectangles as desired.

These steps will guide you in creating this incredible Brownie Cake effortlessly!