12 fresh sweet cherries, pitted
2½ tbsp. tequila
2 tbsp. fresh lime juice
1½ tbsp. (or more) simple syrup
1 tbsp. maraschino cherry liqueur (or maraschino juice)
1 fresh cherry with stem, for garnish
Put the cherries in a cocktail shaker. Mash them with a muddler or the end of a wooden spoon until well crushed, about 1 minute. Add the tequila, lime juice, simple syrup, and 8 large ice cubes. Cover the shaker and shake vigorously for 30 seconds. Immediately strain into an ice-filled glass. Garnish with the fresh cherry.