Lightly grease a cereal bowl with a very thin layer of butter.
I n a small saucepan melt butter over low heat. Once butter has melted, add in the marshmallows. Cook over medium heat till melted and smooth, careful not to burn.
Add in the cereal and stir until well combined. Set a spoon into the cereal bowl and quickly scoop mixture into the bowl, over the spoon. Adjust spoon into desired position.
Pour about 1/4 cup more fresh cereal on top to fill bowl and create a more realistic look. Gently press fresh cereal into marshmallow cereal so they stick together. Cool completely.