Place butter into freezer for about 20 minutes. This step is not necessary but incredibly helpful.
Peel apple and grate into a bowl.
Measure out flour into a large bowl, and add in salt, baking powder, baking soda and cinnamon. Whisk together
In a small bowl, beat 1 egg and add vanilla to egg mixture, stirring to combine
Grate frozen butter into flour mixture, mixing into flour so butter is coated in flour.
Add in grated apple and toss in flour butter mixture
Create a well in the center of the flour mixture and add in egg and vanilla mix, ⅓ cup of cold heavy cream, and ⅓ cup cold cider reduction. Use a fork to mix until dough starts to come together. Do not over mix
Lightly flour counter and dump dough onto counter. Bring dough together and fold over on itself twice. Shape into a disk that is about 8-10 inches wide. Dough will be crumbly, as apple will release extra moisture when baking. Use a knife or bench scraper to cut dough into 8 wedges
Place on a cookie sheet lined with parchment and place in freezer for about 20 minutes. Scones do not have to be frozen, but it helps with rise.
Preheat oven to 425. When scones go into the oven reduce the temp to 375 and bake for about 25 minutes, until scones are golden brown and fragrant.