Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
Whisk flour, sugar, baking powder, and salt in a bowl.
Cut cold butter into dry ingredients until mixture resembles coarse crumbs.
Stir in raisins evenly.
In a separate bowl, whisk egg, heavy cream, and vanilla.
Pour wet mixture into dry ingredients and mix gently until dough forms.
Shape dough into a circle about 1-inch thick and cut into 8 wedges.
Place wedges on baking sheet, brush tops with cream, and bake 16–20 minutes until golden.
Cool slightly before serving.