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Place oven rack at lowest position in oven.
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Preheat oven 375 degrees F.
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In a small bowl, sift together flour, 1/2 cup sugar, cocoa and cinnamon. Mix lightly until well blended.
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In large bowl of electric mixer, mix egg whites, cream of tartar, salt and almond extract until stiff but not dry peaks form.
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Fold flour mixture, a little at a time, into beaten egg whites, gently, until blended.
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Spoon batter into angel food tube pan with removable bottom.
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Gently cut through the batter in the angel food pan to eliminate air pockets.
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Bake 30 -35 minutes, or until cake springs back when tapped with a spatula.
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Immediately invert cake onto soft drink bottle and allow to stand until cooled.