Black cocoa powder, a super-dark Dutch-process cocoa, will make these the darkest chocolate brownies you’ve ever seen. Perfect for Halloween and covering with stretchy melted marshmallows to make tasty, but scary, spider-filled webs.
1 cup unsalted butter, cubed, plus more for the pan
6 ounces semi-sweet Guittard chocolate baking bars, broken into small pieces
1½ cups granulated sugar
1 cup firmly packed dark brown sugar
1½ cups all-purpose flour
¾ cup black cocoa powder
1 ½ teaspoons kosher salt
5 large eggs
1 tablespoon vanilla extract
Preheat oven to 350°F. Line a 9×9” baking pan with parchment, letting excess extend over sides of pan and lightly grease with butter. In the top of a double boiler, place the chocolate pieces and the butter. Cook over simmering water, stirring occasionally, until chocolate is melted and mixture is smooth. Turn off heat, and whisk in sugars. Remove from heat, and let cool slightly.
In a medium bowl, whisk together flour, black cocoa, and salt. Set aside. In a small bowl, lightly whisk eggs. Add half of beaten eggs to chocolate mixture, whisking until combined. Add remaining beaten eggs, and whisk until combined. Whisk in vanilla. Fold in flour mixture until just combined. Spread batter into prepared pan. Bake until a pick inserted in center comes out with only a few crumbs, about 25 minutes. Let cool completely in pan. Using excess parchment as handles, remove from pan and remove the parchment.
Marshmallow Spider Webs
8-10 full size marshmallows
White sanding sugar
Plastic Spiders, cleaned & washed
Melt the marshmallows in the microwave for 30 seconds. Whisk until smooth. Using your fingertips, grab small pieces of the marshmallows and stretch it over the brownies, attaching on the edges of the brownies. Sprinkle with sanding sugar and top with the plastic spiders.