for garnish: reserve about 1/2 cup of Lucky Charms marshmallows
optional: green food coloring
Instructions
In a medium saucepan over low heat, melt butter and mini marshmallows, stirring constantly.
Once melted, pour in cereal and mix until well-coated. (If using food coloring, add it to the melted marshmallows and stir well before adding the cereal)
Press cereal mixture into a greased 8 x 8 or 9 x 9 pan. Sprinkle with reserved Lucky Charms marshmallows.