Wash and trim rhubarb. Slice into thin slices.

Combine rhubarb and sugar in a large gallon size jar, stir well to combine.

Pour vodka over rhubarb/sugar mixture, mix well.

Cover, let the mixture sit in a cool place for 3 to 4 weeks. Stirring once or twice.

Strain the liqueur into a colander over a large bowl.

Discard rhubarb. Strain through cheesecloth and pour into bottles.

Let age for at least 6 months.