Prepare a Bain-Marie by filling a small pot with half a cup of water and bringing it to a boil. Place a large heatproof bowl over the pot.

Add the unsalted butter and vegan marshmallows to the bowl. Whisk continuously until everything melts into a smooth paste, about 2 to 4 minutes.

Carefully remove the bowl from the pot and stir in the salt and red food coloring until you achieve your desired shade.

In a large mixing bowl, pour in the Rice Bubbles and add the melted marshmallow mixture. Mix thoroughly until every piece is coated.

Lightly oil your hands and shape the mixture into oval brain shapes. Use a butter knife to create dents resembling brain grooves and draw veins with a toothpick dipped in food coloring.