Preheat oven to 375 degrees. Lightly grease an 8-inch square baking dish.
Place blueberries into baking dish, and mix with vanilla and lemon juice. Sprinkle with 1-3/4 cups of sugar and 1 teaspoon of flour, then stir in tablespoon of melted butter. Set aside.
In a medium bowl, stir together 1-3/4 cups of flour, baking powder, and 6 tablespoons sugar. Rub in 5 tablespoons butter using your fingers, or cut in with a pastry blender until it is in small pieces. Make a well in the center, and quickly stir in 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.
Preheat oven to 375 degrees. Spoon batter over blueberries, leaving only a few small holes for berries to peek through. In a bowl, mix together cinnamon and 2 teaspoons sugar; sprinkle over top.
Bake for 20 to 25 minutes in preheated oven, or until top is golden brown. A knife inserted into topping should come out clean -of course there will be blueberry syrup on knife. Let cool until just warm before serving. This can store in refrigerator for 2 days. Makes 6 servings. Enjoy!