You will need:
1 cup uncooked white long-grain rice
5 cups water
1/2 cup milk
1/2 tablespoon vanilla extract
1/2 tablespoon ground cinnamon
2/3 cup white sugar
Pour the rice and water into the bowl of a blender; blend until the rice just begins to break up, about 1 minute.
If you have any rice that slips through, use a coffee filter to strain the smaller pieces.
Stir the milk, vanilla, cinnamon, and sugar into the rice water. Stir the cinnamon for a few minutes until most of it is incorporated.
Chill and stir before serving over ice. The cinnamon will float to the top when it sits for a while. A quick shake or stir will fix it right up.
It has a cool, cinnamon refreshing flavor to it.