Step 1

Place the rice and cinnamon stick in a large glass bowl and add the 4 cups of hot water. Cover the bowl with a dish or plastic wrap, then let it soak overnight, or at least 8 hours. *Please see NOTES

Step 2

The next day, pour the rice, cinnamon, and water into your blender and process until it becomes a smooth, watery paste.

Step 3

Using a strainer or sieve, strain the mixture into a wide mouth pitcher, stirring to help the liquid pass through.

Step 4

Add the milk (if using), vanilla extract, and the rest of the water. Stir in the sugar, adjusting the amount to fit your taste. Let the drink chill in the refrigerator. Stir the Horchata before serving, since the rice mix tends to settle at the bottom. Serve in glasses with ice cubes.