Use mint extract for the classic Shamrock Shake flavor — peppermint is stronger and should be reduced if substituted. Start with 5 drops of green food coloring and adjust to your preferred shade; gel coloring is more concentrated than liquid. For a thicker shake, reduce the milk and add gradually. For a thinner consistency, add a splash more milk. Optional adult variation: blend in a shot of Baileys or crème de menthe. Leftovers can be frozen up to 1 month, but texture is best when freshly blended.
Keyword homemade shamrock shake, mint milkshake, shamrock shake, St. Patrick's Day drink