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["Heat oven to 425F.", "Grease large baking sheet.", "In large bowl, combine flour, sugar, baking powder, salt and baking soda.", "With pastry blender or 2 knives, cut in butter until mixture resembles coarse crumbs.", "Remove 1 1/4 c.", "flour mixture to medium-size bowl.", "In small bowl, combine buttermilk and vanilla.", "In cup, combine 1/4 c.", "buttermilk mixture and chocolate.", "Add remaining buttermilk mixture to remaining flour mixture in large bowl and mix lightly with fork until mixture clings together and forms a soft dough.", "Add chocolate mixture to the1 1/4 c.", "flour mixture and stir with fork until it forms a soft dough.", "Turn both doughs out onto lightly floured surface; divide chocolate dough into 6 pieces.", "Dot 3 chocolate pieces over surface of plain dough.", "Fold dough over and dot with remaininng 3 pieces; knead gently 5-6 times to marbelize dough.", "Divide dough in half.", "With lightly floured rolling pin, roll one half into a 7"" round.", "Cut into 4 wedges.", "Repeat with remaining half of dough.", "Place scones, 1"" apart, on greased baking sheet.", "Pierce tops with tines of fork.", "Bake scones 15-18 min.", "or until golden brown.", "Serve warm."]
