Roll out the crescent dough triangles onto a baking sheet. Place 1 tablespoon of blueberries on the widest end of each triangle and sprinkle with ½ teaspoon of confectioners’ sugar.
Beginning with the wide end, roll up each crescent around the blueberries and pinch both sides to seal completely.
Set oven to 375° F or 190° C. Place in oven for 12 minutes
Remove from the oven and keep on a wire rack to cool for about 5 minutes.
Dust with remaining confectioners’ sugar and drizzle with vanilla frosting before serving.