Spray 2 muffin tins with nonstick cooking spray.
In a large pot, melt butter over medium heat.
Add the marshmallows to the pot. Cook over medium heat until the marshmallows are melted and well combined with the butter.
Remove from heat. Stir vanilla and salt into the marshmallow mixture.
Add the cereal to pot and stir until it is evenly coated in the marshmallow mixture.
Scoop out heaping ¼ cup of the rice krispie mixture and add it to 16 muffin cups. Using a tablespoon measuring spoon, press the rice krispies down in the center of each up to create a nest.
After the treats have set for an hour, remove them from the muffin cups and transfer them to a plate.
Add the coconut to a large resealable bag along with 3-4 drops of green food coloring. Shake the bag to color the coconut.
Add around 1 tablespoon of the green coconut to the center of each nest.
Top each nest with three mini eggs.