Preheat the oven to 375° F
Lightly grease an 8 inch square baking dish.
Place the blueberries into the baking dish, and mix with vanilla and lemon juice. Sprinkle with 1 cup of sugar and 1/8 cup of flour.
Stir in the tablespoon of melted butter.
Set aside.
In medium bowl, stir together 1 3/4 cups of flour, baking powder, and 6 tablespoons sugar.
Cut in the 5 tablespoons butter.
Make a well in the center, and quickly stir in the milk.
Mix just until moistened. You should have a very thick batter, or very wet dough. You may need to add a splash more milk.
Cover, and let batter rest for 10 minutes.
Spoon the batter over the blueberries, leaving only a few small holes for the berries to peek through.
Mix together the cinnamon and 1 tablespoon sugar.
Sprinkle over the top.
Bake for 20 to 25 minutes in the preheated oven, or until the top is golden brown. A knife inserted into the topping should come out clean.
Let cool until just warm before serving.