Preheat the oven to 350°F (175°C).
Grease a 9x9-inch baking pan or line with parchment paper.
In a large mixing bowl, combine granulated sugar, brown sugar, and melted butter.
Add the eggs and vanilla to the sugar mixture and beat until combined.
In a separate bowl, whisk together flour, cocoa powder, baking powder, salt, and spices.
Gradually add the dry mixture to the wet ingredients, stirring until just combined.
Fold in the chocolate chips until evenly distributed.
Pour the batter into the prepared baking pan and spread it evenly.
Bake for 25-30 minutes or until a toothpick inserted comes out with a few moist crumbs.
Let the brownies cool in the pan for at least 10 minutes before cutting.