The Food Network website has a recipe for making candied yams from scratch at home. This easy recipe takes about 30 minutes to prepare and serves four. It averages 5 stars on the site's user rating scale.
To make Keyshawn's Mom's Candied Yams, begin by cutting 3 pounds of sweet potatoes or yams into 2-inch cubes. Put them into a pot. Cover the potatoes with 1 cup white sugar, 1 cup brown sugar and two sticks of cubed sweet butter.
Place the pot over medium heat, and cook for about 20 minutes. When done, potatoes are tender and hold their shape. Do not overcook.