01 -
Preheat oven to 350°F. Grease and line an 8×8-inch baking pan with parchment paper.
02 -
In a mixing bowl, whisk together melted butter and granulated sugar until smooth. Add eggs and vanilla extract, continuing to whisk until fully incorporated.
03 -
Sift in cocoa powder, all-purpose flour, salt, and baking powder. Gently fold the mixture until just combined, avoiding overmixing.
04 -
Optionally fold in semi-sweet chocolate chips evenly into the batter.
05 -
Pour the batter into the prepared pan and spread evenly. Bake for 20 to 25 minutes or until a toothpick inserted in the center comes out with moist crumbs.
06 -
Allow brownies to cool completely in the pan before cutting into squares.
07 -
Using white decorating icing, pipe a spiral onto each brownie square. Drag a toothpick from the center outward to form a spiderweb pattern.
08 -
Optionally place small candy spiders on top for an added festive effect.