Combine water, molasses, orange juice, cinnamon and vanilla extract in a bowl.

Evenly slice your yams.

Place yam slices into the marinade and allow to marinate for at least an hour in the refrigerator.

Preheat oven to 250 degrees fahrenheit.

Place on a cookie sheet 1/4 inches apart, brush with marinade for additional flavor.

Dry in an oven, with the door slightly open to let out moisture, for about 3 to 4 hours until you have achieved the texture you want.

Cool and store in an air tight container.