Once you've baked your brownies, let them cool completely, then cut into squares. I find it easiest when I line my baking dish with parchment paper or aluminum foil, and let it hang over the edges. Then I can easily lift all the brownies out, trim the edges (which my kids eagerly scarf down), then cut into equal and even-sized pieces.

Pipe a circle spiral on the top of each brownie, starting in the middle.

Then take your toothpick and make lines through the frosting--from side to the other--kind of like you're cutting a pizza.

And you have adorable Spiderweb Brownies!