In a saucepan over medium-high heat, add together all ingredients (whisking them to combine) and bring to a boil, about 1-2 minutes.
Reduce the heat to low and simmer for another 2-3 minutes. Remove from heat.
TO MAKE THE LATTE:
In a medium saucepan on medium-high heat, add the milk and bring to a boil for 1-2 minutes. Whisk in the coffee and reduce the heat to simmer before adding in the cinnamon, nutmeg, allspice, ginger, cloves, and coriander, whisking everything together until combined.
ASSEMBLY:
To serve, pour latte in prepared mug(s) followed by the brown sugar syrup, and top with Coconut whipped cream and sprinkle with cinnamon.