Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large mixing bowl, combine the flour, sugar, baking powder, salt, and cinnamon.
Cut in the cold, cubed butter until the mixture resembles coarse crumbs.
Stir in the diced apple.
In a separate bowl, whisk together the heavy cream and vanilla extract.
Pour the wet ingredients into the dry ingredients and mix until just combined.
Turn the dough out onto a floured surface and knead gently. Pat into a circle about 1-inch thick.
Cut the dough into 8 wedges and place them on the prepared baking sheet.
Bake for 18-20 minutes, or until golden brown. Let cool slightly before serving.