You probably know créme de cassis from a infamous French kir or kir royale. It's a 30 proof blood-red liqueur made from black currents. It has deep woodland berry notes and a sweetness thst balances well balanced against the acidity. It would remind you of a full-flavored berry jam. Drink it quickly to retain it's clean fruitiness. I love the stuff.
1 handful of fresh cherries, about 12, pitted
1 1/2 ounce blanco 100% agave tequila
1/2 ounce créme de cassis
1/2 ounce agave nectar
1/2 ounce water
3/4 ounce lime fresh lime juice
Fresh cherries as a garnish
Place the cherries in a shaker and muddle or mash them for 1 minute. Add the tequila, créme de cassis, agave nectar, water, lime juice and lots of ice cubes. Place the top on the shaker and shake vigorously for 30 seconds. Immediately strain into a highball glass filled with fresh ice. Garnish with a cherries and serve immediately.