Heat oven to 375 degrees F. Line a baking sheet with parchment paper.

In a large bowl or bowl of a stand mixer fitted with the paddle attachment, stir together flour, sugar, baking powder and salt. Use a pastry cutter or your fingers to cut in the butter until the pieces are the size of small peas and the mixture resembles a coarse crumb.

Pour in the buttermilk; stir until just combined. Add blueberries and stir until just combined (do not overmix or you'll break the blueberries).

Scoop or spoon slightly less than 1/4-cupfuls of batter onto prepared baking sheet. Bake 25 minutes until biscuits are puffed, golden brown and baked through. Serve warm.