Preheat your oven to 450°. Prepare your large baking pan with parchment paper, a silicone mat or non-stick spray. Prepare a floured work surface on your kitchen counter. I use these disposable counter covers for easy clean up. Cut your butter into very small cubes. Pour a pinch or two of flour into a small bowl and roll the butter cubes in the flour to coat and prevent them from sticking to each other. Set this bowl in the freezer while you prepare the dough.
In a large bowl, add the dry ingredients; salt, sugar, flour and baking powder then blend with a whisk.
Slowly add the buttermilk to the dry ingredients while incorporating it, mixing by hand. At this point you are creating your dough. Your dough should be sticky.
Next, add the cold butter. Remove the bowl with the butter cubes from the freezer and remove the butter cubes from the flour in the bowl. Discard the excess flour.
Important step. Now sprinkle about 1/4 cup of flour onto the sticky dough and toss to coat the entire dough ball so that it isn’t quite so sticky. NOW, add the butter cubes and incorporate into the dough kneading by hand. Add more sprinkles of flour as needed because the dough may get to sticky for kneading.
Carefully work the blueberries into the dough. Knead carefully so as not to smash the blueberries.
Now turn your dough out onto a floured surface. Roll your dough out to desired thickness using a rolling pin or work it out by hand if you don’t have a rolling pin. A thickness of about 1/8″ is what I do.
Use a biscuit cutter or the rim of a small glass to cut your biscuits to the desired size. Place each biscuit about 1/2″ apart onto your prepared large baking pan. Bake in a preheated oven for about 7 to 12 minutes or until nice and golden brown.
While the biscuits are baking make your glaze and set aside.
In a small microwave safe bowl, melt 1 tablespoon of butter in your microwave and gently brush onto the top of the hot biscuits when you remove them from the oven. Then add the glaze once the biscuits have cooled slightly.