"Who doesn't love a chocolate mousse cake? But even better is a Tunnel of Mousse Cake with mousse utilized as both frosting and filling!..."
INGREDIENTS
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1/2 cup sifted cocoa powder
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3/4 cup boiling water
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1 3/4 cups sifted cake flour
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1 3/4 cups sugar
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1 1/2 teaspoons baking soda
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1/2 teaspoon salt
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1/2 cup vegetable oil
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7 egg yolks, reserve egg whites
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2 teaspoons vanilla
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1 cup of egg whites (7 or 8), at room temperature
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1/2 teaspoons cream of tartar
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***For Mousse***
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4 cups heavy cream
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1 1/2 cups powdered sugar
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3/4 cup sifted cocoa
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2 teaspoons vanilla
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1/4 teaspoon salt