Add 3 cups of water and one cinnamon stick to a Dutch oven.
Set the heat to medium high and wait for it to boil.
Add 1 and ½ cups of washed rice.
Give it a quick mix, then cover, reduce the heat to low, and cook until most of the water has dried up.
Add 1 cup of whole milk, 1 can of evaporated milk, 1 can of sweetened condensed milk, and 1 Tbsp of vanilla extract.
Give it a good mix.
Cover and cook for about 10 to 12 minutes, stirring occasionally.
