Preheat your oven to 350°F (175°C).
In a large bowl, cream together the softened butter and sugar until fluffy.
Add in the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In a separate bowl, whisk together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Gently fold in the fresh blueberries.
Drop spoonfuls of dough onto a baking sheet lined with parchment paper.
Bake for 12-15 minutes, or until the edges are lightly golden.
Remove from the oven and let cool on a wire rack before dusting with powdered sugar.