Put the butter in the freezer to get it cold quickly, if not already in the fridge. You want to use COLD butter.
Cut the butter into small cubes.
In a large mixing bowl add dry ingredients and mix: flour, sugar, baking powder, and salt. Add cold milk and blueberries to the dry ingredients and mix. (Add a few more drops of milk if the dough seems too dry.)
Add the butter cubes to the batter and mix together with your hands (TIP: spray your hands first with cooking spray). Keep mixing until the butter is mixed evenly throughout the dough. There will be chunks of butter!
On a floured surface, roll the dough about ¼ to ½ inches thick. Using a biscuit cutter cut approximately 6-8 biscuits from the dough.
Bake biscuits 8-12 minutes. Remove from the oven and allow to cool.
Make the glaze:
While the biscuits are baking, make the glaze. In a small bowl, mix together the powdered sugar, water, vanilla and almond extract, and lemon juice. Optional to add 1-2 tsp of lemon zest to the glaze for more citrus flavor.
TIP: The glaze will be on the runny side. Start with less water, and add as you need it.
Drizzle (or use a pastry brush) glaze over the warm biscuits. Serve!