1. Preheat the oven to 350 degrees Fahrenheit.
2. Now put the canned yams in a shallow baking dish, then put it aside.
3. You can now proceed to combine the butter, sugar, and syrup in a small saucepan. Then bring to a boil, reduce the heat to a low level and continue to cook – stirring periodically – until the sauce has thickened.
4. Bake for 20-30 minutes after pouring the sauce over the canned yams.
5. Before serving, nutmeg and/or ground cinnamon can be sprinkled on the dish.

Watch this video recipe to see more on cooking canned yams.