Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.

Mix dry ingredients: In a large bowl, whisk together flour, sugar, baking powder, and salt.

Cut in butter: Add the cold butter cubes and use a pastry cutter or your fingers to work it into the flour until the mixture looks like coarse crumbs.

Combine wet ingredients: In a small bowl, whisk together heavy cream, egg, and vanilla.

Mix together: Pour the wet ingredients into the dry mixture. Stir gently until just combined.

Add blueberries: Gently fold in the blueberries, being careful not to crush them.

Shape: Turn the dough onto a lightly floured surface. Pat it into an 8-inch circle, about 3/4-inch thick. Cut into 8 wedges and place on the baking sheet.

Finish: Brush the tops with a little heavy cream and sprinkle with coarse sugar if you like.

Bake: 18–22 minutes, until golden and set. Cool slightly before enjoying!