Step 1.
- Toast the marshmallow over an open flame until golden brown.
Step 2.
- In a shaker, combine dark rum, cinnamon syrup, and fresh lemon juice with ice.
Step 3.
- Shake well until chilled.
Step 4.
- Strain the mixture into a mason jar filled with ice.
Step 5.
- Top with ginger beer and gently stir.
Step 6.
- Garnish with the toasted marshmallow on a skewer.