Preheat the oven to 425°F (220°C) and line a baking sheet with parchment paper.

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

In another bowl, combine the milk, melted butter, and egg. Mix well.

Pour the wet ingredients into the dry ingredients and stir until just combined. Gently fold in the blueberries.

Scoop the dough onto the prepared baking sheet, forming 8 equal biscuits.

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

Remove from the oven and let cool slightly before serving.