The classic combination of rice, cinnamon, and vanilla cools the palate after a spicy Mexican meal. But you can also enjoy a scoop mid-afternoon for a refreshing sweet on a hot day. Please note that the Prep time is hands-on time only. Allow several hours for the ice cream to freeze before serving.
In a large bowl, whisk together the coconut milk, rice milk, oil, and cinnamon until combined.
Put the aquafaba and cream of tartar in a mixing bowl and beat on high speed with a mixer until stiff peaks form, about 10 minutes. Reduce the speed to low and add the powdered sugar and vanilla. Once incorporated, increase the speed and continue mixing until the mixture is well blended.
Fold ⅓ of the aquafaba mixture into the coconut milk mixture just until combined. Repeat this with the remaining aquafaba, being careful not to overmix and deflate the aquafaba.
Transfer the mixture to an 8-inch square baking dish. Wrap tightly with plastic wrap and freeze until solid, at least 4 hours or overnight.