Grease a large mixing bowl and a baking pan with butter.

In a large pot over medium heat, melt 3 tablespoons of butter until liquefied.

Add 6 cups of mini marshmallows and stir until completely melted, around 4-5 minutes.

Remove from heat and gradually add 6 cups of crispy rice cereal while folding it in gently.

Add a few drops of food coloring and fold in until desired color is achieved.

Pour mixture into the greased baking pan and press down evenly. Cool for about 30 minutes.

Once cooled, cut into fun Halloween shapes using a sharp knife or cookie cutters.

Melt dark chocolate and drizzle over the cut shapes, then add decorations like candy corn and gummy worms.

Arrange on a festive platter and serve.