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1
Into a bowl sift together the flour and the confectioners' sugar, add the butter, and blend the mixture until it resembles meal.
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2
In a small bowl whisk together the egg yolk, the ice water, and the rum, add the mixture to the flour mixture, and combine the mixture until it forms a dough.
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3
On a work surface knead the dough with the heel of a hand for a few seconds to distribute the fat evenly and form it into a ball.
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4
Dust the dough with flour and chill it, wrapped in wax paper, for 30 minutes.
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5
Halve the dough, on a floured surface roll out 1 of the halves 1/8 inch thick, and cut it into rounds with a 1 1/2-inch scalloped cutter.
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6
Gather the scraps together, reroll them, and cut out more rounds.
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7
Roll out the remaining half of the dough 1/8 inch thick and cut out more rounds in the same manner.
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8
Cut out the centers of half the rounds with a 1/2-inch plain round cutter to form rings.
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9
Bake the rounds and rings in batches on greased baking sheets in the middle of a preheated 325F.
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10
oven for 12 minutes, or until they are faintly golden.
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11
Transfer the cookies with a metal spatula to racks and let them cool.
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12
Spread the bottom of each round lightly with some of the jam and top it with one of the rings.
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13
Drop a scant 1/4 teaspoon of the remaining jam in the center of each cookie and let the cookies stand on the racks for 1 hour.
