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.
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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.