Rha Rha (Sis Boom Bah)
1 1/2 oz. white rum
3/4 oz. rhubarb shrub (see below)
2 oz. dry champagne
Garnish lemon twist
In a cocktail shaker filled with ice, add the white rum and rhubarb shrub. Stir and strain into a chilled coupe glass. Top with the champagne and garnish with a lemon twist.
Rhubarb Shrub
12 cups granulated sugar
4 cups apple cider vinegar
4 cups rhubarb juice
4 oz. Everclear grain alcohol (optional)
Add the sugar and vinegar to a large saucepan over medium heat and stir until all the sugar has dissolved. Remove from the heat and allow to cool.
Add the rhubarb juice and stir. Add the Everclear for stability, if desired. Pour into an appropriately sized bottle or cup and refrigerated until needed.
— Jamie Boudreau, “The Canon Cocktail Book”
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