To make the horchata, you will need water, rice, evaporated milk, condensed milk, cinnamon, and vanilla extract. Once the horchata is made, you will also need espresso to make the lattes.
One day in advance, combine the rice, canela, and 4 cups of hot water in a bowl ... add an ounce of rum to each glass before adding the horchata. Garnish with a mint sprig and a piece of cinnamon.