Melt butter and cocoa together. ... Mix well. Add flour, salt, nuts and vanilla. ... 45 minutes. Sprinkle marshmallows on hot cake and cover ... well; pour over cake.
Boil sweet potatoes until tender; peel and slice. Make syrup of sugar, flour, water, butter, salt and ... Cool slightly, arrange marshmallows on top. Return to oven and brown. 6 servings.