01 - Place peppermint leaves in a clean, sealable glass jar and cover completely with vodka.
02 - Seal the jar and store in a cool, dark place for 1 to 2 weeks, gently shaking every few days.
03 - After steeping, strain the liquid through a fine mesh strainer or cheesecloth, discarding the leaves.
04 - Combine sugar and water in a small saucepan; heat over medium heat, stirring until sugar dissolves completely. Cool to room temperature.
05 - Mix the cooled syrup into the strained peppermint vodka and stir thoroughly.
06 - Add 2 to 3 drops of natural green food coloring if desired for visual appeal.
07 - Transfer the cordial into a clean, sterilized bottle. Store refrigerated or in a cool, dark place. Serve chilled.