This refreshing cocktail combines the tartness of fresh key limes with the smoothness of cachaça and a touch of sweetness from simple syrup. 

Ingredients:
- 2 fresh key limes, cut into wedges
- 2 oz cachaça
- 1 oz simple syrup
- Crushed ice

Directions:
1. Muddle the key lime wedges in the bottom of a shaker or glass.
2. Add the cachaça and simple syrup and stir to combine.
3. Fill a glass with crushed ice and pour the mixture over the ice.
4. Garnish with a slice of key lime and enjoy!