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1
Place egg whites in large bowl; let stand at room temperature for 30 minutes. Line a greased 15x10x1-in. baking pan with waxed paper; grease the paper and set aside.
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2
In a large bowl, beat egg yolks on high speed for 5 minutes or until thick and lemon-colored. Gradually beat in 1/3 cup sugar. Sift flour, baking cocoa, baking powder and salt together twice; gradually add to yolk mixture and mix well (batter will be very thick).
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3
With clean beaters, beat egg whites on medium speed until soft peaks form. Gradually beat in remaining sugar, 1 tablespoon at a time, on high until stiff peaks form. Gradually fold into batter. Spread evenly into prepared pan.
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4
Bake at 375u00b0 for 10-12 minutes or until cake springs back when lightly touched. Cool for 5 minutes. Turn cake onto a kitchen towel dusted with cocoa powder. Gently peel off waxed 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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5
Meanwhile, for the filling, beat the cream in a large bowl until soft peaks form. Gradually add sugar and almond extract, beating until stiff peaks form. Unroll the cake; spread the filling to within 1 in. of edges. Roll up again.
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6
In a large bowl, cream the butter and confectioners' sugar until light and fluffy. Beat in the chocolate, milk and vanilla until smooth. Frost the cake, using a metal spatula to create a bark-like effect.