S’mores Brownies

INGREDIENTS

• 16 Tbs. (2 sticks) unsalted butter
• 10 oz. bittersweet chocolate, finely chopped
• 1 cup granulated sugar
• 3/4 cup firmly packed light brown sugar
• 4 eggs
• 2 tsp. vanilla extract
• 1 tsp. kosher salt
• 1 1/3 cups cake flour
• 3 Tbs. natural cocoa powder
• About 6 graham crackers, roughly crushed with your hands
• About 12 jumbo marshmallows