The easiest, creamy and slightly sweet homemade Authentic Mexican Horchata.
To a blender, add rice, 2 cups of water, and 2 cinnamon sticks.
Blend about for 2 minutes or until the rice and cinnamon sticks are roughly ground. Add the remaining water and blend again.
Pour contents into a pitcher or container with a fitted lid and place on your countertop overnight (or for at least 8 hours).
Pour the rice mixture into a fine mesh strainer, into a pitcher. Discard the rice.
Stir in the milk, vanilla, cinnamon, and sugar (to your preference). Chill until ready to serve. Stir well before serving and serve over ice.