1 cup packed light brown sugar
½ cup baking cocoa
2 cups water
12 to 14 marshmallow, quartered
1 (2-layer) package chocolate cake mix
½ cup chopped walnuts
Preheat oven to 350 degrees.
Combine brown sugar, cocoa, water and marshmallows in greased 9 x 13 inch pan. Mix well.
Prepare cake mix using package instructions. Spoon over brown sugar mixture. Sprinkle with walnuts. Bake at 350 for 25 to 30 minutes or until cake tests done.
Cool in pan. Invert to serve. Serve with whipped cream or ice cream.