Toast the spices in a dry saucepan over medium heat for 2-3 minutes, stirring frequently until fragrant. This crucial step awakens the essential oils in the spices.
Add water to the saucepan with the toasted spices and bring to a boil. The water should bubble vigorously to properly extract flavor from the spices.
Reduce heat to low and simmer uncovered for 10 minutes, allowing the spices to infuse the water completely.
Add the black tea and turn off the heat. Let steep for 3-5 minutes depending on how strong you like your tea. Avoid steeping longer as it can make the tea bitter.
Strain the tea mixture through a fine-mesh strainer into another container, pressing on the solids to extract all the flavor.
Stir in your sweetener while the tea is still hot, ensuring it dissolves completely. Adjust to taste.
Heat the milk in a separate saucepan until steaming but not boiling, or microwave for about 90 seconds.
Froth the milk using a milk frother, whisk, or blender until foamy. For extra-rich foam, blend the hot milk for 30 seconds.
Pour the tea concentrate into mugs, filling them halfway.
Top with the frothed milk, spooning any extra foam on top. Finish with a light dusting of ground cinnamon.