Cassis is a wonderful mixer-a unique ingredient akin to blackberry or currant, but not quite as tart. It can be rather sweet, so you only need a small amount to add that extra dimension of juicy berry flavor to your Batch 22.
Shake over ice:
2 oz. Batch 22 Classic Gold aquavit
.5 oz. cassis
.5 oz. fresh lime juice
1 lime wheel, muddled
Strain into highball glass with ice
Top with soda