Prep the Setup: Gather all your ingredients on a clean workspace, including marshmallows, Fruity Pebbles cereal, and optional fillings.

Melt Marshmallows: In a large saucepan, combine 4 cups of marshmallows over low heat, stirring continuously for about 5–7 minutes until melted.

Combine Cereal: Add 6 cups of Fruity Pebbles cereal to the melted marshmallows, stirring gently to coat every piece.

Form Sushi Rolls: Pour the marshmallow-cereal mixture onto parchment and flatten it out. Add any fillings, then roll tightly using the parchment.

Slice: Let the log sit for about 10 minutes, then use a sharp knife to cut into 1-inch pieces.

Store: Place the sliced sushi in a single layer in an airtight container.