Preheat your oven to 350°F (175°C) and prepare an 8x8-inch baking pan by greasing it or lining it with parchment paper.

Melt ½ cup of unsalted butter in a medium saucepan over low heat and stir in 1 cup of granulated sugar and ⅓ cup of unsweetened cocoa powder until smooth. Cool for about 5 minutes, then whisk in 2 large eggs one at a time.

In a separate bowl, sift together 1 cup of all-purpose flour and a pinch of salt. Gradually fold this dry mixture into your chocolate mixture using a spatula until just combined.

Pour the brownie batter into the prepared baking pan, spreading it evenly. Bake in the preheated oven for 25-30 minutes, checking for doneness with a toothpick.

While the brownies are cooling, melt 1 cup of white chocolate chips in a microwave-safe bowl, stirring until smooth. Optional: mix in black gel food coloring.

Once cooled, transfer the brownies to a serving dish and drizzle the melted white chocolate in a crisscross pattern to create a spider web.

Allow the decorative white chocolate to set, then slice the brownies into squares and serve.