Preheat oven to 450
Cube 6 tablespoons of Butter in small squares , place in a small bowl and place in the freezer for 10 minutes
Melt 2 tablespoons of butter and brush the pan you are using liberally, I used a cast iron skillet
In a large mixing bowl sift together the flour, baking powder, baking soda, salt and granulated sugar
Once the butter is cold enough using a fork or pastry cutter cut the butter into the flour mixture until the butter looks like small pebbles or peas
Remove the buttermilk from the fridge and slowly mix it into the flour mixture.
Fold in blueberries carefully, if using frozen they won't break as easily
Turn the mixture onto a floured surface and with floured hands press the dough into a1/2 -3/4 rectangle-Do Not Roll or the berries will break
Use a bicuit cutter or glass and cut the biscuits and place them in the pan
You will need to reform the dough to cut more biscuits, you should be able to get 5-6 depending on the size
Brush the biscuits with the melted butter
Bake in preheated oven for 10-14 or until golden brown
While the bicuits are baking mix the glaze to the consistency you like using fresh lemon juice
Once the biscuits are done let them cool for 5 minutes
Drizzle glaze on biscuits