01 - Set up a brain-shaped mold or line a medium bowl with plastic wrap to create the brain form for later shaping.
02 - Heat butter in a large saucepan over medium heat. Add mini marshmallows and stir continuously until completely melted and smooth.
03 - Add red or pink food coloring drop by drop to the marshmallow mixture, stirring until a realistic brain-like hue is achieved.
04 - Remove from heat. Fold in crispy rice cereal, mixing thoroughly until every piece is evenly coated. Let cool until safe to handle.
05 - Using buttered hands, press half the cereal mixture into the prepared mold, working it up the sides to create a hollow cavity in the center.
06 - Spoon the jam and coulis into the central cavity, keeping it centered and away from the edges.
07 - Cover the filling with remaining cereal mixture, pressing firmly to seal completely. Gently shape the exterior to enhance brain-like contours.
08 - Let set at room temperature for 20–30 minutes until firm. Carefully unmold onto a serving plate.
09 - Use food coloring and a small brush to paint detailed ridges and highlight lines. Add candy eyes or sprinkles for extra Halloween flair before slicing and serving.