- Preheat oven to 400 degrees F. Line a baking sheet with parchment paper. Set aside. In a large bowl, mix together flour, brown sugar, baking powder, salt and cinnamon.  
- Add grated butter to the mixer and cut together with a pastry cutter or two forks, until it resembles course sand. 
- Add 1/2 cup heavy cream, vanilla extract and shredded apple. Mix until it just comes together. Lay out a pastry mat or piece of parchment paper. Dump mixture onto the mat or parchment paper and gently pat into a 1/2-inch thick circle. Cut into 8 even triangles. 
- Place scones 2 inches apart on the prepared baking sheet. Brush with remaining 2 tablespoons of heavy cream. Bake for 15 to 20 minutes, until light golden brown. 
- While scones are baking, make the maple glaze. Add powdered sugar, maple syrup, heavy cream, vanilla and salt to a bowl and whisk together until smooth. Add to a small ziplock bag. Set aside. 
- Once scones have cooled, snip a small corner off the ziplock bag then drizzle scones with the maple glaze. When glaze has hardened, store in an air tight container for 3 to 4 days.