1 large sweet potato
2 cups soy milk
1/4 teaspoon ground cinnamon
Preheat oven to 350 degrees F (175 degrees C).
Bake sweet potato in the preheated oven until tender and cooked through, about 1 hour. Remove peel from cooked sweet potato and cool in the refrigerator 8 hours or overnight.
Blend sweet potato, banana, soy milk, and cinnamon together in a blender until smooth.