Preheat oven to 400.
In a mixing bowl, combine flour, baking powder, salt and sugar; mix until well combined.
Using a fork or pastry blender, cut the butter into the flour mixture; continue to work the butter until mixture begins to resemble cornmeal.
Make a well in the middle of the flour mixture and slowly add milk into the well.
Stir until dough starts to come together and looks shaggy. Add more milk, if needed.
Fold in blueberries and gently stir just until berries are combined. Do not overmix.
Lightly flour your working area.
Turn out dough; dust the top of dough with a bit of flour and roll out the dough to one inch thickness.
Cut out biscuits from dough using a round biscuit cutter.
Set biscuits on an ungreased baking sheet.
Bake for 15 to 16 minutes, or until edges are golden brown.
Remove from oven and turn out onto cooling racks.
Let cool and serve.