Spray a 9 x 13 pan with cooking spray.

In a large saucepan heat the butter over medium heat.

Add in the candy corn marshmallows and stir until melted.

Remove from heat and add in the rice cereal and candy corn and stir until combined.

Pour the mixture into the prepared pan and spread evenly. Allow to cool for 15 minutes.

Melt the yellow, orange, and white chocolate in separate bowls in the microwave in 30 second intervals. Pour each into a zip top baggie. Snip the end off of one baggie and drizzle over the Krispies treats. Repeat with remaining chocolate.

Cut into squares and serve.