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In a large bowl, beat eggs and sugar. Beat in remaining cake ingredients.
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Grease a 10"x15" jelly roll pan. Line pan with waxed paper, then grease and lightly flour the waxed paper.
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Pour batter into the pan and spread evenly. Bake at 350F for 15 minutes. *Cake cooks fast so watch carefully to avoid burning the edges.
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While cake is baking, sprinkle powdered sugar heavily over the kitchen towel, using a sieve or sifter.
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Turn hot cake onto the towel.
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Remove waxed paper. Trim off burnt or crusty edges.
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Sprinkle more powdered sugar over the hot cake and quickly roll up with towel inside. Let cake cool completely, about 30 minutes.
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Meanwhile, prepare filling by beating together all ingredients until smooth and creamy.
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Unroll cooled cake and spread with the filling mixture. Roll up cake with filling on the inside. Wrap in waxed paper and then foil.
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Refrigerate or freeze. To serve, slice cake about 1/3 inch thick and sprinkle with powdered sugar.
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Note - cake cuts best when still slightly frozen.