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1
Place a rack in the center of the oven, and preheat the oven to 350u00b0 F. Lightly grease and flour a 10-inch tube pan with butter and flour. Shake out the excess flour, and set the pan aside.
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2
Place the sugar and butter in a large bowl, and beat with an electric mixer on medium until light and fluffy, 3 minutes. Set the bowl aside.
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3
Sift the flour and baking powder into a large bowl, and sift 2 more times. Add the flour mixture to the creamed butter and sugar in 3 additions, alternating with the milk. Beat on medium speed until the mixture is just blended. Scrape down the sides of the bowl with a rubber spatula, and fold in the almonds and vanilla. Set the bowl aside.
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4
In a large mixing bowl, beat the egg whites and salt with clean beaters on high speed until stiff peaks form, 4 to 5 minutes. Fold about a quarter of the beaten whites into the batter, just until combined. Fold the remaining whites into the batter, just until combined. Pour the batter evenly into the prepared pan, and place the pan in the oven.
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5
Bake the cake until it is golden brown and a toothpick inserted in the center comes out clean, 57 to 62 minutes. Remove the pan from the oven and place on a wire rack to cool for 15 minutes. Run a knife around the edges, give the pan a gentle shake, and invert the cake onto the rack to cool, right side up, 1 hour. Slice and serve.
