Preheat the oven to 350°F (175°C) and grease your baking pan.
Cream together the softened butter and granulated sugar in a mixing bowl until light and fluffy.
Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
In a separate bowl, combine flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Be careful not to over-mix!
Fold in the chocolate chips for an extra burst of chocolate flavor.
Pour the batter into the greased pan and spread it evenly.
Bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
Allow to cool before slicing and serving. Enjoy your delicious creation!