Randall Greenleaf of Philadelphia's Southwark combines the best parts of a hot toddy and hot buttered rum for this warming cocktail. The recipe's flexibility allows you to play with your favorite amari, sub in allspice dram or creme de cacao. Greenleaf also recommends switching out the "Irish whiskey for rye, bourbon, or rum to create more bready, spicy, or sweet flavors, and apples can be replaced with pears and quince."