Maple Oatmeal Walnut Scones

1. Preheat oven to 375ºF.
2. Mix flours, oats, baking powder, baking soda, and salt in a large mixing bowl.
3. Add butter pieces to the flour mixture and incorporate until crumbly. Sprinkle sugar on top, not mixing together.
4. Beat egg and buttermilk in a small bowl and pour over the flour/sugar mixture.
5. Carefully mix the milk mixture into the dry ingredients with a fork, scraping from the bottom to top in large swift sweeps.
6. When dough is about half-mixed, add maple syrup and walnuts. Continue to mix until all flour is incorporated, but no further.
7. Form dough into a circular loaf, about 1 1/2″ thick, and cut into 8 triangular pieces. Sprinkle coarse sugar on top before baking. Place each triangle on a baking sheet and bake for 12–15 minutes.
8. Once scones have cooled, mix maple syrup, vanilla, and powdered sugar in a small bowl and drizzle over the top of scones.