Preheat the oven to 425°F (220°C).

In a mixing bowl, whisk together the flour, baking powder, sugar, and salt.

Cut in the cold butter using a pastry cutter until the mixture resembles coarse crumbs.

Gently fold in the blueberries.

Add the milk and stir until just combined. Do not overmix.

Turn the dough out onto a floured surface and pat into a 1-inch thick rectangle.

Cut out biscuits using a biscuit cutter and place them on a baking sheet lined with parchment paper.

Bake in the preheated oven for 15-20 minutes or until golden brown.

Remove from the oven and let cool slightly before serving.