Preheat oven to 400° F.

In medium bowl, mix flour, 1/2 c. sugar, baking powder, baking soda, salt and orange zest (if using).

Grate butter in to flour mixture on large holes of a box grater. Use your fingers to work in the butter, then stir in the raisins.

In a small bowl, whisk sour cream, egg, buttermilk & extract until smooth. Using fork, stir sour cream mixture in to flour mixture until large clumps form. Use your hands to press dough against bowl.

Place on lightly floured surface & pat in to a 8″ circle, about 3/4″ thick. Sprinkle with 1 tsp sugar. Use sharp knife to cut into 8 wedges.

Place on parchment lines cookie sheet & bake for 15-17 minutes. Cool 5 minutes & serve warm or room temperature.