Preheat oven to 375 degrees F.

Mix flour, baking powder, baking soda, salt, and sugar in a bowl.

Cut in butter with a pastry blender.

Stir in cinnamon chips.

Mix egg yolk, buttermilk, and vanilla in a pyrex measuring cup.

Add to dry ingredients.

Stir until just combined.

Scrape out onto floured surface.

Knead 6-8 times.

Divide dough in half.

Form 6 inch circle with dough and cut each circle into 6 triangles.

Place on baking sheet (not greased).

(Optional) We usually skip this step, but you can brush the tops of your scones with an egg wash if you wan to give them some extra color.

Cook for 15-18 minutes at 375 degrees. (rotate 180 degrees at halfway point)

Cool on a wire rack.