Preheat oven to 375°F. In a mixer with a paddle, combine all dry ingredients: the flour, oats, baking powder, sugar, and salt.
Cut in the butter until small sized pieces remain. Replace paddle with dough hook.
In another bowl, whisk together the egg, maple syrup, maple extract (optional), and buttermilk.
Add wet mixture to dry and mix just until a dough forms with dough hook.
Roll dough to ¾ inch thickness on a floured surface, and cut into your desired scone shape.
Place scones on parchment-lined baking sheet and brush the tops with egg wash.
Bake for 18 minutes and set aside to cool.
Once cooled, brush scones or drizzle with Maple Glaze.