Fill a medium saucepan with ½ cup water and bring to a gentle boil. Place a large heatproof bowl on top to create a double boiler effect for melting ingredients.

Add the unsalted butter and regular marshmallows to the bowl. Whisk continuously until the mixture is completely melted and smooth, which should take about 2-4 minutes.

Remove the bowl from the heat. Whisk in the salt and 2-3 drops of red food coloring to achieve that vibrant brain hue. Adjust the color to your preference!

Pour the melted mixture over the Rice Krispies in a large mixing bowl. Stir quickly but gently to ensure all the cereal is evenly coated with the gooey mixture.

Lightly oil your hands with vegetable oil to prevent sticking. Take portions of the mixture and shape them into oval brain forms, then carve a groove down the center for a more realistic look.

Use a toothpick dipped in additional food coloring to draw vein patterns on your marshmallow brains. Get creative—this is where the spooky fun really shines!