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["Preheat oven to 375u00b0F.", "Oil a jelly roll pan with cooking oil or nonstick Passover spray.", "Cut waxed paper to line pan with a 1"" overlap on each side.", "Oil or spray the paper.", "Dissolve coffee in warm water and stir into melted chocolate.", "Place 5 egg yolks in a bowl, add sugar and beat until sugar is dissolved.", "Add half the vanilla.", "Blend in cooled chocolate mixture.", "Beat 5 egg whites until stiff but not dry and fold into chocolate.", "Spread batter onto oiled jelly roll pan and bake 5 minutes.", "Reduce oven to 350u00b0F and bake 10 minutes more or until a toothpick inserted comes out clean.", "While cake is baking, melt bittersweet chocolate in a double boiler or over very low heat.", "Set aside to cool.", "Place margarine in a bowl and beat until creamy.", "Add superfine sugar and continue beating until light and fluffy.", "Add cooled chocolate and remaining vanilla and mix well.", "Add remaining eggs one at a time, beating well after each addition until mixture is smooth.", "Refrigerate until slightly firm.", "Wet a dish towel, wring it dry and cover the chocolate roll 10-20 minutes.", "Flip cake onto 2 pieces of overlapping sheets of waxed paper dusted with cocoa.", "Fill with chocolate filling and roll lengthwise.", "Refrigerate or freeze until ready to serve."]
