Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large bowl, whisk together flour, brown sugar, baking powder, and salt.
Cut in the cold butter using a pastry cutter until the mixture resembles coarse crumbs.
Stir in the chopped pecans.
In a small bowl, whisk together heavy cream, maple syrup, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined.
Turn the dough out onto a lightly floured surface and knead gently a few times. Pat into a circle about 1-inch thick. Cut into 8 wedges and place on the prepared baking sheet.
Bake for 18-20 minutes, or until golden brown. Let cool slightly before serving.