Melt butter on low heat in a large pan, then add marshmallows.
Stir marshmallows and butter over low heat until all of the marshmallows have melted completely, then mix in the green food dye and remove from the heat.
Combine your rice cereal with the melted marshmallows. I used my hands to lightly crush some of the cereal squares as I added to marshmallows - this will help the mixture form its shape a little easier.
Once all of the cereal has been coated in your green melted marshmallow, press your mixture into your very lightly greased mini donut pan to form the wreath shape.
Allow the wreath shapes to cool enough that they are able to hold their shape before removing from the pan and placing on wax paper to decorate. You will want to work as quickly as possible to to shape each round of wreaths without allowing the remaining mixture time to cool completely.
Once all wreaths have been formed, you can use your icing and sprinkles to decorate however you wish! [Clearly I ran out of time to decorate all of my wreaths - you win some, you lose some.]
