Preheat your oven to 350°F (175°C) and prepare a baking pan by greasing it or lining with parchment paper.

In a medium saucepan over low heat, melt the butter with sugar and cocoa powder for about 5 minutes, stirring continuously until smooth and glossy. Remove from heat and let cool slightly.

Whisk in the eggs one at a time, ensuring each is fully blended before adding the next.

In a separate bowl, sift together the flour and a pinch of salt. Gradually fold this dry mixture into the chocolate batter until just combined.

Pour the batter into the prepared pan and bake for 25-30 minutes, checking for doneness with a toothpick.

Once cooled, melt the white chocolate chips in a microwave-safe bowl until smooth and add food coloring if desired.

Drizzle the melted chocolate in concentric circles over the brownies and use a toothpick to create a spider web design.

Slice the brownies into squares and serve on a festive platter.