Preheat oven to 425, line a baking sheet with parchment paper
Combine dry ingredients in a food processor. Process butter until crumbly. Add to a large bowl and make a well. Pour in the milk or cream and stir until just combined. Turn the dough out on to a lightly floured counter and knead a few times. Roll out the dough to 1 inch thickness. Using a glass or biscuit cutter, make 10 circles.
Place the circles on the baking sheet, brush with milk or cream, sprinkle with sugar and bake for 12-14 minutes. Transfer to cooling rack
While baking, rinse the blueberries. Add the sugar and juice. Cover and refrigerate.
Whip the cream with icing sugar. Gently fold in vanilla. Refrigerate
To assemble, split the biscuits and layer with whipped cream and blueberry mixture and replace the top. Dust with icing sugar and serve
Recipe by Friday is Cake Night at https://www.fridaycakenight.com/2014/04/blueberry-biscuits/