1 (29 oz.) can yams
1/2 cup white sugar
1/2 cup brown sugar
1/2 cup liquid from canned yams
4 tbsp. (1/2 stick) butter
1/2 tsp. vanilla
cinnamon

Drain yams, dry in 200°F oven on greased cookie sheet for 30 to 60 minutes. Put in greased casserole dish.

Bring sugars, liquid from yams to a boil. Boil until it begins to thicken. Add butter and vanilla. Pour over yams, sprinkle with cinnamon.

Bake at 350°F for 1 hour.