In a heatproof glass, lightly muddle the orange peel with cinnamon stick and star anise.
Add bourbon, gingerbread syrup, honey, lemon juice, and bitters.
Pour in hot water and stir gently until honey dissolves.
Taste and adjust sweetness or lemon to preference.
Top with an orange slice or sprinkle of extra spices if desired.
Notes
Choose a bourbon with caramel or vanilla notes for best pairing. Rye whiskey can add more spice. If no gingerbread syrup is available, combine molasses, brown sugar, and ground spices in hot water as a substitute.