Preheat oven to 375°F. Line jelly roll pan, 15½ x 10½ x 1 inches, with aluminum foil; grease generously. Mix flour, cocoa, baking powder, and salt; reserve. Beat eggs in bowl on high speed about 3 minutes or until very thick and lemon colored. Gradually beat in granulated sugar. Beat in water and vanilla on low speed. Beat in flour mixture on low speed just until smooth. Pour into pan, spreading batter to corners. Bake 12 to 15 minutes or until top springs back when touched lightly. Immediately loosen cake from edges of pan; invert on towel sprinkled generously with powdered sugar. Carefully remove foil; cool cake. Prepare Marshmallow Frosting. Cut cake lengthwise into 4 rectangles. Spread about 1/3 cup frosting between each layer. Prepare Chocolate Glaze. Pour over cake, allowing some to drizzle down sides. Provided by General Mills
Serves 12.Approximate Nutrition Analysis (per serving): calories, 330; protein, 4 g; carbohydrate, 72 g; fat, 3 g; cholesterol, 55 mg; sodium, 120 mg.
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