Spiced Honey Bourbon Old Fashioned Pitcher

1. To make the spiced honey syrup. In a medium pot, bring 1/2 cup water, the honey, rosemary, cinnamon, cardamom, and ginger to a boil over high heat. Boil 2-3 minutes, then remove from the heat. Stir in the orange zest and vanilla. Let cool. Remove the rosemary, cinnamon, cardamom pods, and ginger. 
This syrup makes enough for about 6 drinks.
2. In a punch bowl, combine the honey syrup, the bourbon, lemon juice, orange juice, and orange bitters. Stir to combine, chill until ready to serve. Serve over ice. Garnish with an orange slice and rosemary, if desired.