Preheat oven to 400°F.
In a medium bowl, whisk flour, sugar, baking powder, baking soda and salt.
Grate butter into flour mixture a bit at a time, occasionally tossing the grated butter in the flour with your hands.
Stir dried fruit or chocolate chips into to the flour mixture.
In a small bowl (at least 3 cup capacity), use a fork to combine sour cream, egg and extract.
Add the sour cream mixture into the flour mixture, using a wooden spoon to stir. Lightly knead the mixture in the bowl to incorporate all of the flour.
For regular-sized scones: On a lightly floured surface, gently pat the dough into a circle measuring about 7-8" wide and ¾" thick.
For mini scones: Separate the dough into 2 equal pieces. On a lightly floured surface, gently pat the dough into 2 circles measuring about 5" wide and ¾" thick.
If desired, sprinkle with 1 teaspoon coarse sugar. Using a large knife, cut each circle into 8 triangles (like pie wedges). Flour the knife if it gets too sticky.
Place scones on an ungreased baking sheet 1" apart. For regular-sized scones: bake 15-17 minutes until golden brown. For mini scones: bake 12-14 minutes until golden brown.