Preheat oven to 400°F. Line a large baking pan with parchment paper. Set aside.
In a large bowl, whisk flour, brown sugar, baking powder, cinnamon, nutmeg, and salt.
Cut in butter with using a pastry cutter or two forks until mixture resembles coarse sand.
Then fold in chopped apple.In a small bowl, whisk heavy cream, egg, and vanilla. Gradually add to flour mixture until dough comes together.
Turn dough out onto prepared pan or a lightly floured surface. Knead several times and shape into an 8-inch disk.