In a medium saucepan, combine 1 cup of water and 1 cup of brown sugar over medium heat. Stir until the sugar is completely dissolved, creating a simple syrup.

Add ½ cup of canned pumpkin puree and 1 teaspoon of pumpkin pie spice to the saucepan. Whisk together until smooth and well combined.

Bring the mixture to a gentle simmer and let it cook for about 5 minutes, stirring occasionally. This helps to meld the flavors together.

Remove from heat and stir in 1 teaspoon of vanilla extract. Allow the syrup to cool completely before using.

In a large glass, add 2 cups of ice cubes. This will chill the latte and keep it refreshing.

Pour 2 cups of cooled strong brewed coffee over the ice. The coffee should be brewed strong to ensure the flavor stands out against the milk and syrup.

Add ¼ cup of the prepared pumpkin spice syrup to the coffee. Adjust the amount based on your sweetness preference.

Pour in 1 cup of milk (or your preferred dairy-free alternative) and stir well to combine all the ingredients.

Top with whipped cream if desired and sprinkle a little pumpkin pie spice on top for garnish.

Serve immediately with a straw and enjoy your homemade iced pumpkin spice latte!