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place flour and salt in medium bowl -- cut in butter till it resembles coarse crumbs.add sour cream.stir till well blended.
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divide dough into 4 parts.wrap each piece seperately in plastic wrap --
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refrigerate 2-4 hours.
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preheat oven to 350* --
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roll out dough on lightly floured surface to 12x6 rectangle.
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spread 1/4 of the filling over dough.to within about 1/2" of edge.sprinkle with coconut --
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roll up, short side first -- jelly roll style -- pinch seam to seal --
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repeat with remaining dough --
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bake 40-45 minutes or rolls are golden brown.
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remove from sheets to rack.dust with powdered sugar --
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cool completely.
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cut in 1" slices.