In a small saucepan, combine water, brown sugar, and cinnamon. Stir the mixture over medium heat until the sugar is completely dissolved and the syrup starts to thicken slightly, about 5-7 minutes. Remove from heat and stir in 1/4 teaspoon of vanilla extract. Let it cool.
In a separate pan, heat up your milk over low heat. You can froth the milk if you have a frother or use a whisk to create some foam. If you prefer an iced latte, simply skip heating and pour cold milk over ice.
To assemble the Cinnamon Dolce Latte, pour your brewed espresso into a mug. Add homemade cinnamon dolce syrup, adjusting it to taste if you like it sweeter. Pour the heated milk into the mug and stir to combine.
For a little extra cinnamon flavor, stir your drink with a cinnamon stick or sprinkle a pinch of cinnamon powder on top.
For an iced latte, used iced coffee or espresso serve it over ice and garnish with a cinnamon stick for a festive touch.