Add the water, sugar, cinnamon stick, cloves and allspice to a pot over medium-high heat and cook until the sugar dissolves.
Let the mixture sit and cool to room temperature, and remove the whole spices before adding the syrup to a jar or bottle.
For the chai tea:
Steep the chai tea bags in the hot water until strongly brewed (about 5-10 minutes).
For the foamed milk:
Add the milk to a mason jar and shake very well to froth. Froth with a hand-held milk frother, if desired.
If you'd like a warm latte, heat the milk in a pot and froth with a hand-held frother.
Alternatively, froth the cold milk in an electric milk frother (if you have one) on the cold setting (or the hot setting if you'd like a warm latte), or simply shake the mason jar very well until everything is combined and a small layer of foam appears on the top of the milk.
To serve:
Pour the milk (over ice, if desired) into each glass or mug. Add 2 tablespoons of the simple syrup to each glass or mug.
Pour 1/2 cup of the tea over the milk into each mug or glass.
Top each latte with any leftover foam and sprinkle with cinnamon (optional).
Notes
The simple syrup recipe makes 8 tablespoons of simple syrup (or 1/2 cup), so feel free to add a little extra simple syrup to each serving depending on your tastes, or substitute with maple syrup if desired.To make this recipe low carb/keto, simply replace the simple syrup with a few drops of liquid stevia.For a warm latte, simple skip the ice and heat the milk in a pot on the stove just to a simmer, or in the microwave, before frothing.