Line an 8x8 inch pan with parchment paper and set it aside.
Melt the butter in a large saucepan over low heat. Add the marshmallows and stir until fully melted and smooth.
Divide the melted marshmallow mixture evenly between two bowls.
Stir the orange food coloring into one bowl and the yellow food coloring into the other bowl until each reaches a consistent shade.
Add 1 1/2 cups of cereal to the orange bowl and stir until coated. Add the remaining 1 1/2 cups of cereal to the yellow bowl and stir until coated.
Drop spoonfuls of both mixtures into the prepared pan, alternating colors. Gently press them together to create swirls without fully blending.
Sprinkle the chopped candy corn over the top and press lightly to set it in place. Let the treats cool for 30 minutes before slicing.