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Preheat oven to 350 degrees.
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Comnbine first 3 ingredients in a medium bowl; cut in butter with a pastry blender or two forks until crumbly. Mixture will look very dry, Gently press mixture together with hands, pressing until blended and smooth, about 2-3 minutes.
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Shape dough into 2 four inch long logs. Wrap in plastic wrap and chill 1 hour. Cut each log into 1/4" thick slices and place on lightly greased baking sheet. Brush with milk.
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Bake at 350 degrees for 12-15 minutes or until lightly browned.
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Can also shape dough into 10 x 8 " rectangle on a lightly floured surface and cut into 32 squares using a pastry cutter wheel or knife. Place squares on lightly greased baking sheet, brush with milk and bake as above.