Preheat your oven to 425° F. Line a baking sheet with parchment paper.
In a food processor, combine the flour, baking powder, sugar, and salt. Pulse until mixed.
Add the butter and pulse about 10 to 15 times until the mixture resembles coarse cornmeal.
Transfer the mixture to a large bowl. Mix the vanilla paste with the heavy cream, then combine with the dry ingredients.
Gently fold the ingredients together until the dough forms, being careful not to overmix.
Flour your surface and knead the dough a few times, then gently fold in the blackberries.
Shape the dough into an 8-inch round and cut into 8 wedges.
Place on the baking sheet and bake for 15 to 18 minutes until light brown.
Cool on a wire rack for 10 minutes before serving.
