Often uses spices like cardamom, cinnamon, ginger, peppercorns, cloves, and anise, along with milk, sugar, and (of course) black tea.
FrancesHocutt's recipe (draft):
Grind up all the spices and break up the cinnamon stick. Put everything in a pot. Heat on medium until the milk starts to simmer and rise in the pan, then turn it down and simmer for 5-10 minutes.
Similar to FrancesHocutt's, but only one clove, at least 2x as many peppercorns, and I boil the spices (minus the tea) in the water for 6ish minutes before adding milk and tea.