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In a large mixer bowl combine the eggs, egg whites, vanilla, and anise; mix until well-combined.
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Add the sugar, flour, soda, and salt; beat until a dough forms.
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Add the nuts.
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Turn the sticky dough onto a lightly floured board; knead several times.
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Divide the dough in half.
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With floured hands, form the dough into two flattish logs, about 15" long by 2" wide.
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Place the logs about 3" apart on a baking sheet that has been sprayed lighted with cooking spray.
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Bake at 325 degrees for 40 minutes.
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Remove and cool for 10 minutes.
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Reduce oven to 275 degrees.
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On a cutting board, cut the logs diagonally into 3/4" thick slices.
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Arrange the slices on the baking sheet and bake for 10-12 minutes; turn and bake another 10-12 minutes.
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Turn heat off and leave biscotti to crisp in the oven for another 15 minutes.
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Remove and cool completely.