6 c.(1.5 qts.) vanilla ice cream
3 to 3 3/4 c. milk (see note)
3/4 tsp. mint extract
27 drops green food coloring
Optional: (Redi-Whip) whipped cream, green-colored sugar
Blend ice cream, milk, mint extract, and food coloring in a blender until smooth (I suggest starting with 3 c. milk and adding up to 3/4 c. more, depending on your desired thickness).
[No blender? You could use a hand mixer as well!]
Pour into glasses. Top with whipped cream and colored sugar if desired.
(To rim the glass as I did, moisten outside of glass with water, using your finger to spread it evenly around the glass. Dip glass into a bowl of the colored sugar and twist to coat.)