Combine the Butter-Infused Bourbon, vermouth and bitters in a cocktail shaker filled with ice. Stir for 30 seconds and strain into a chilled glass. The cocktail can be serve straight up or on the rocks. Garnish with the orange zest and cherry.
Combine the bourbon and butter in a medium saucepan over medium heat and cook until the butter melts. Transfer to a container and freeze until the butter has solidified. Remove the large piece of bourbon-infused butter and reserve, refrigerated in an airtight container, for cooking. Strain the bourbon through a fine-meshed sieve and coffee filter to remove any remaining particles of butter. Return the butter-infused bourbon to its original bottle and keep frozen to use in cocktails for up to one month.