01 -
Preheat the oven to 350°F. Grease and line a 9x13-inch baking pan with parchment paper.
02 -
In a large bowl, whisk together melted butter and granulated sugar until glossy. Add eggs one at a time, beating well after each addition, then stir in vanilla extract.
03 -
In a separate bowl, sift together flour, cocoa powder, salt, and baking powder.
04 -
Gradually fold the dry ingredients into the wet mixture until just combined to preserve a fudgy texture.
05 -
Pour half the batter into the prepared pan. Drizzle half the caramel sauce over it. Add remaining batter, smooth the surface, then swirl the remaining caramel on top using a butter knife for a marbled effect.
06 -
Bake for 28–32 minutes until a toothpick inserted near the center comes out with moist crumbs. Remove and cool completely on a wire rack.
07 -
Cut cooled brownies into squares. Place one marshmallow atop each square, securing with a small dab of caramel if needed.
08 -
Optionally, lightly toast marshmallows using a kitchen torch or broiler until puffed and golden, watching closely to avoid burning.
09 -
Press two mini chocolate chips into each marshmallow to form eyes. Dust lightly with powdered sugar and drizzle extra caramel sauce over each brownie for a spooky finish.