Preheat the oven to 400°(F). Line a large baking sheet with parchment paper, or silicone baking sheet. Set aside while you make the scone dough.
In a large bowl, whisk together flour, brown sugar, baking powder, baking soda, and salt.
Cut the butter into the dry ingredients, until the mixture resembles coarse crumbs. In another bowl, combine the egg, buttermilk, and vanilla. Stir into the crumb mixture just until moistened.
Stir in the chocolate chips and pecans.
Turn onto a lightly floured surface. Knead gently 8 times. Pat the dough into a 6-inch disc. Cut the disc into 8 equal wedges, place on a lined baking sheet.
Bake in the preheated oven until golden brown, about 15–20 minutes. Remove from the oven and place on a cooling rack for 5 minutes.
While the scones are cooling, make the glaze. In a small bowl, combine powdered sugar, vanilla bean paste, and hazelnut creamer, or milk. Whisk until smooth. Drizzle over scones. Let set 5 minutes and serve warm.