4 c. mashed cooked sweet potatoes, or yams (6 med. to large sweet potatoes)
1 c. granulated sugar
1/2 c. brown sugar
1/2 tsp. ground cinnamon
1 tsp. vanilla
1/2 c. (1 stick) butter
1/2 c. milk
1 (1 lb.) can undrained crushed pineapple (Dole has less juice)
Chopped pecans as desired, optional
Marshmallows as desired

Combine all ingredients except the marshmallows. Blend mixture thoroughly and spoon into buttered 2 quart oblong baking dish. Top with marshmallows. Bake in 300 degree oven for 1 hour.