1. Create Your Bain-Marie Setup: Fill a medium saucepan with approximately ½ cup of water and bring it to a gentle boil. Place your large heatproof bowl over the pot, ensuring the bottom doesn’t touch the water directly.

2. Melt the Marshmallow Base: Add butter and marshmallows to the heatproof bowl. Whisk continuously with steady, circular motions for 2-4 minutes until the marshmallows dissolve into a glossy, cohesive paste.

3. Add Color and Seasoning: Carefully remove the bowl from the heat. Immediately whisk in the salt. Add 2-3 drops of red food coloring to start, mixing it in.

4. Combine with Rice Krispies: Pour the warm marshmallow mixture over the Rice Krispies in a large mixing bowl. Work quickly to stir and ensure every piece of cereal is evenly coated.

5. Shape Your Halloween Brains: Lightly oil your hands to prevent sticking. Grab portions of the mixture roughly the size of a tennis ball and shape them into ovals.

6. Add Details: Use a butter knife to create a characteristic groove down the center of each oval. Dip a toothpick in red food coloring and draw realistic vein patterns across the surface for a spooky effect.