Prepare a baking sheet with parchment paper. Set aside.
In a large pot, melt butter and mini marshmallows on medium heat. Make sure you stir every 15-30 seconds until everything is melted.
Add food coloring a few drops at a time until you get desired color.
Take the pot off the heat and add the crisped rice cereal.
Stir until all the cereal is fully coated.
Pour mixture onto prepared parchment paper. Shape into a large egg form.
Place in the fridge for at least 30 minutes.
Once the egg is cool, peel it off the parchment and flip it over so the smooth side is up.
Decorate as desired.