1. In a medium saucepan, combine sugar, water and juice over medium-high heat; stir.
2. Add the cinnamon stick; cook and stir until sugar is dissolved (2-3 min.). 
3. Reduce heat to low. Add cherries; simmer until cherries just start to soften (about 5 min.).
4. Remove saucepan from the heat; stir in vanilla and liqueur. Allow cherries to fully cool in the pan; discard cinnamon stick.
5. Spoon cherries into a glass storage container(s); cover with syrup from the pan. Store in the refrigerator, tightly covered, for up to 3 weeks.
6. If desired, store any extra cocktail syrup separately in the refrigerator for up to 3 weeks.

Tasty Tip:

• For the most beautiful cherries, use the blunt end of a wooden skewer to gently push the pit from the cherries without pulling the halves apart.