Chocolate Chip-orange Scones (bon Appetit)

Why I Love This Recipe
Ingredients You'll Need
2 c unbleached a-p flour
1/3 c plus 3T sugar
1t baking powder
1/2t baking soda
1/2 c butter, diced
3t grated orange peel, divided
1c miniature SS choc chips
2/3 c chilled buttermilk
1 L egg yolk
1t vanilla extract
Directions
Butter and flour baking sheet. Whisk flour, 1/3 c sugar, baking powder, salt, and baking soda in large bowl. Add butter and 2t orange peel; rub in with fingertips until mix resembles coarse meal. Mix in choc chips. Whisk 2/3 c buttermilk, egg yolk, and vanilla in small bowl to blend. Add buttermilk mix to dry ingredients; stir w/fork until dough comes together in moist clumps.
Gather dough into ball. Press out dough on lightly floured surface to 3/4" thickness. Using 2" heart-shaped cookie cutter, cut out scones. Gather scraps, press out dough, and cut out additional scones. Transfer to baking sheet, spacing 1" apart.
Preheat oven to 400. Mix remaining 3T sugar w/1t orange peel in small bowl. Brush scones lightly w/buttermilk; sprinkle w/orange-sugar. Bake until scones are crusty on top and tester inserted into centers comes out clean - about 15 minutes (up to 20 minutes if they've been refrigerated). Serve warm or at room temperature.