In a pint-size Mason jar or other sealable container, combine cognac, cloves, star anise, cinnamon stick, and ginger. Seal, and place in a cool, dark place until desired flavor is achieved, 3 days to 1 week. Strain, discarding solids.
In a large pitcher or glass bottle, combine spiced cognac, sweet vermouth, whiskey, ¾ cup distilled water, Bénédictine, and all bitters. Freeze for 4 hours or up to overnight.
To serve, pour desired amount into a chilled rocks glass. Garnish with orange slice, if desired.
Recipe by Louisiana Cookin' at https://louisianacookin.com/6-recipes-for-a-christmas-eve-feast/