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1
Preheat oven to 375u00b0. Line bottom and sides of a greased 15x10x1-in. baking pan with parchment paper; grease paper.
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2
Beat eggs on high speed until thick and pale, about 5 minutes. Gradually beat in sugar until well mixed. Reduce speed to low; beat in water and vanilla. In another bowl, whisk together flour, baking powder and salt; add to egg mixture, mixing just until combined.
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3
Transfer batter to prepared pan. Bake until cake springs back when lightly touched, 10-12 minutes. Cool 5 minutes. Invert onto a kitchen towel dusted with confectioners' sugar. Gently peel off parchment paper. Roll up cake in the towel jelly-roll style, starting with a short side. Cool completely on a wire rack.
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4
Meanwhile, beat butter, brown sugar and cinnamon until creamy. Unroll cake; spread brown sugar mixture over cake to within 1/2 in. of edges.
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5
For filling, beat cream cheese and butter until creamy. Beat in confectioners' sugar and cinnamon; gradually add cream until mixture reaches a spreadable consistency. Spread filling over brown sugar mixture. If desired, sprinkle with walnuts. Roll up again, without towel; trim ends if needed. Place on a platter, seam side down.
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6
For glaze, heat butter in a small saucepan over medium-low heat until foamy and golden, 6-8 minutes. Remove from heat. Stir in confectioners' sugar and vanilla, then add cream 1 tablespoon at a time, stirring well, until mixture reaches a pourable consistency. Slowly pour glaze over top of cake, allowing some to flow over sides. If desired, top with walnuts. Refrigerate, covered, at least 2 hours before serving.
