1/2 ounce simple syrup 170
2 ounces Riesling 171
3/4 ounce fresh lemon juice 172
1 1/2 ounces pisco, preferably Quebranta ice 173
8 seedless grapes 174
In a cocktail shaker, gently muddle the grapes until they burst. Add the remaining ingredients and enough ice to fill a rocks glass and shake well for 20 seconds. Pour the contents of the shaker into the rocks glass.