01 - Line a medium bowl with plastic wrap to create a brain-shaped mold, or use a brain-shaped mold if available.
02 - In a large saucepan over medium heat, melt the butter. Add the mini marshmallows and stir until completely melted and smooth.
03 - Add a few drops of red or pink food coloring to the marshmallow mixture, stirring until you achieve a brain-like pinkish hue.
04 - Remove from heat and stir in the crispy rice cereal, mixing until evenly coated. Allow the mixture to cool just enough to handle safely.
05 - With buttered hands, press half the cereal mixture into the prepared mold, pressing up along the sides to create a hollow cavity in the center.
06 - Spoon the jam and coulis into the cavity, keeping it centered. Gently cover with the remaining cereal mixture, sealing the filling completely inside.
07 - Press and shape the cereal gently to enhance the brain-like appearance with natural ridges. Let set at room temperature for 20 to 30 minutes until firm.
08 - Unmold carefully onto a serving plate. Optionally use food coloring and a small brush to add detailed brain cell ridges or highlight lines. Add candy eyes or sprinkles for extra spookiness. Slice and serve to reveal the oozing berry filling.