Place the brown rice, 3 cups of almond milk, vanilla, cinnamon, salt, and maple syrup in a medium pot set over medium/high heat. Bring the mixture to a boil.
Once boiling, reduce the heat to low and cover the pot with a lid. Let simmer for 45 minutes, stirring occasionally. Add the remaining cup of milk and simmer for another 15-20 minutes, or until the rice is soft and chewy.
Serve with a sprinkle of cinnamon and optional almond milk.
