Preheat oven to 475 degrees.
Make the glaze: In a small bowl, combine all glaze ingredients and whisk until smooth. Set aside.
Make the biscuits: In a medium bowl, combine flour, baking powder, salt, and sugar.
Using a pastry cutter, cut in the butter until the butter is about pea sized.
Slowly add buttermilk and using a fork, stir until just combined.
Sprinkle your prepared kneading area with some flour. Place the sticky dough on the floured area and sprinkle with more flour.
Roll the dough out and flatten to about 1/2″ thickness. Sprinkle more flour, if needed.
Pour the blueberries onto the dough. Fold the dough over (sprinkle more flour, if needed) and gently knead it a couple of times and roll back out to about 1″ thickness. Sprinkle more flour, if really sticky.
Using a biscuit cutter, cut out biscuits.
Place biscuits in a buttered 10 inch cast-iron skillet making sure biscuits are touching. Brush with milk to help them brown.
Bake at 475F for about 10 minutes. After 10 minutes, brush with melted butter liberally. Place back in the oven for 5 minutes more.
Once done, pour the glaze over the biscuits. Serve immediately. Say Grace and enjoy!