Step 1

Stir the water, lemon zest, lime zest, orange zest, cinnamon sticks, dried orange peel, whole coriander seed, nutmeg, and green bean coffee powder (if using) in a large saucepan over medium heat.

Step 2

Stir in the sugar and bring to a boil.

Step 3

Continue stirring until the sugar dissolves. (The spices will not dissolve)

Step 4

Remove syrup from the heat.

Step 5

Add the lemon juice, lime juice, orange juice, browning sauce, and pure vanilla extract to the saucepan mixture and stir.

Step 6

Let mixture cool, then use a fine mesh strainer and strain syrup into a mason jar or other sealable bottle for storage.

Step 7

To make one cola drink: Combine 1/2 cup of the cola syrup with 1 1/2 to 2 cups of seltzer water (pour slow as the mix will fizz, just as regular soda).

Step 8

Add ice, if desired, and serve.