To make the gingerbread simple syrup add 1 cup of water, 1 cup sugar, ½ teaspoon cinnamon, ½ teaspoon ground ginger, ¼ teaspoon allspice to a sauce pan and bring to a boil, frequently stirring. Once the syrup comes to a boil, reduce the heat and simmer on low until the sugar has dissolved. Let the simple syrup cool before serving and store leftovers in an airtight jar up to two weeks.