Blend cereal in a food processor until it’s a fine powder. Mix with milk until it resembles oatmeal.
1 cup Lucky Charms cereal, ½ cup milk
Add cereal mixture to a blender. Add crème de menthe, then fresh mint, and ice cream.
¼ cup crème de menthe, 10 fresh mint leaves, 3 cups vanilla ice cream
Blend until smooth but still thick.
Pour into glass and top with whipped cream and marshmallows.
Whipped cream, Lucky Charms marshmallows