1Toast rice and cinnamon sticks in a small pot over medium heat.
2Transfer rice and cinnamon to a bowl and cover with water to soak.
3Transfer soaked rice and cinnamon into a blender and blend until smooth.
4Strain the mixture back into a pot.
5Add white sugar, brown sugar, water, vanilla bean, and ground cinnamon into the pot and whisk to combine.
6Cook the syrup mixture over heat until it reaches your desired thickness.
7Pour the prepared syrup into a glass jar and refrigerate.
8To make the coffee, combine instant coffee, a drizzle of sweetened condensed milk, evaporated milk, and some of the prepared horchata syrup in a glass.
9Froth the coffee mixture until it is foamy.
10Add sweetened condensed milk to the sides of a fresh serving cup for decoration.
11Fill the cup with ice and add some horchata syrup.
12Top with whole milk, evaporated milk, and the prepared frothy coffee.