Cakes On Clouds

3 Large eggs, separated
1/2 Cup sugar
5 Ounces melted semisweet chocolate
1/2 Cup water
1 Teaspoon vanilla extract
3/4 Cup flour
1 Teaspoon baking powder
1/2 Teaspoon baking soda
2 Cups whipped cream
3/4 Cup tiny marshmallows
1 1/2 Cups powdered sugar
1 Ounce melted unsweetened chocolate
1/4 Cup light cream

      Preheat oven to 350 degrees. Line a 10 by 15- inch jelly roll pan with foil and leave foil one inch over edge. Lightly grease and flour foil.
     Beat together egg yolks and sugar. Mix in semi sweet chocolate. Add water and vanilla and mix well. Mix in flour, baking soda , and baking powder.
     Beat egg whites till you form peaks and fold in chocolate mixture. Pour into foil pan. Bake about 9 minutes till toothpick in center comes out clean.
     Loosen cake from the foil. Dust a dish towel with unsweetened cocoa powder. Put cake on dusted towel and remove foil. Roll up cake starting at the short end with the towel inside and let it completely cool on rack.
     Mix the whipped cream and marshmellows. Unroll the cake and remove the towel. Spread the whipped cream mixture over the cake and roll back up.
     Stir together the powdered sugar and melted unsweetened chocolate. Slowly stir in the light cream and use it to frost the cake. Garnish with chopped nuts if desired.