Triple-Chocolate Chunk Scones

I don't know why I haven't made scones before--they are so simple!  In fact, they are very similar to biscuits in the combining part.  It is only fitting that the first post in three months should contain our blog's name in three varieties.  :)

2 c. flour
1/3 c. firmly-packed brown sugar
1 1/2 t. baking powder
1/4 t. baking soda
1/4 t. salt
1/2 c. butter
1/2 c. buttermilk
1 egg
1 1/2 t. vanilla
3 oz. bittersweet chocolate, cut into 1/2" pieces (I used semisweet chips)
3 oz. milk chocolate, cut into 1/2" pieces (I simply broke it into chunks)
3 oz. white chocolate, cut into 1/2" pieces (I used chips)

Preheat oven to 375° F.  In a large bowl, stir together flour, brown sugar, baking powder, baking soda, and salt.  Cut in butter until the mixture resembles coarse crumbs.  In a small bowl, combine buttermilk, egg, and vanilla.  Add to the flour mixture and stir to combine.  Stir in chocolate chunks until they are evenly distributed.  Using a 1/4-cup measure, drop the dough onto an un-greased baking sheet, leaving 2 inches between scones.  Bake for 20-25 minutes.