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1
Using two knives or a pastry blender, cut butter into flour and salt until mixture resembles fine crumbs; stir in the sour cream with a fork until incorporated well and you've made a ball of dough.
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2
Divide the resulting pastry dough into 4 portions; wrap each portion in plastic wrap and refrigerate for at least 8 hours or overnight.
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3
Pre-heat oven to 350F degrees.
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4
Mix together the cheese, garlic powder, and dried basil; divide into 4 portions.
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5
Roll each portion of the pastry into a rectangle, about 12x6 inches, on a well-floured board and sprinkle with a portion of the cheese mixture.
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6
Fold ends to meet in center, forming a square; sprinkle with a portion of the cheese mixture.
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7
Fold in the previously-folded edges to meet in the center, sprinkle with a portion of cheese mixture, then fold lengthwise in half (as if you were closing a book).
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8
Flatten the dough lightly, sprinkle with remaining cheese mixture, then fold lengthwise again.
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9
Cut approximately 3/16-inch slices on the folded edge and place slices on an un-greased cookie sheet.
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10
Bring the ends of each slice together to form a fan shape.
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11
Bake until light brown, about 20 to 25 minutes.
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12
Makes about 48 fans, which make nice appetizers.
