1Adjust oven rack to lower-middle position and preheat to 400 degrees.
2In a medium bowl mix flour, sugar, baking powder, baking soda and salt. Grate butter into flour mixture on the large holes of a box grater. Use your fingers to work in butter (mixture should resemble coarse meal), then stir in raisins and orange peel.
3In a small bowl whisk sour cream and egg until smooth. Using a fork stir sour cream mixture into flour mixture until large dough clumps form. Use your hands to press the dough agains the bowl into a ball(the dough will be sticky in places and there may not seem to be enough liquid at first but as you press the dough will come together).
4Place on a lightly floured surface and pat into a 7 to 8 inch circle about 3/4 inch thick. Sprinkle with remaining 1 teaspoon of sugar. Use a sharp knife to cut into 8 triangles. Place on a cookie sheet lined with parchment paper about 1 inch apart. Bake until golden, about 15 to 17 minutes. Cool for 5 minutes and serve warm or at room temperature.
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