- 2 1/2 cups fresh or frozen blueberries
- 1 teaspoon vanilla extract
- 1 lemon, juiced
- 1/2 cup white sugar, or to taste
- 1/2 teaspoon all-purpose flour
- 1 tablespoon butter, melted
- 1 3/4 cups all-purpose flour
- 4 teaspoons baking powder
- 4 tablespoons white sugar
- 5 tablespoons butter
- 1 cup milk
- 2 teaspoons sugar
- 1 pinch ground cinnamon
- Lightly grease an 9×13 baking dish. Place the blueberries into the baking dish, and mix with vanilla and lemon juice. Sprinkle with 1 cup of sugar and 1/2 teaspoon of flour, then stir in the tablespoon of melted butter. Set aside.
- In a medium bowl, stir together 1 3/4 cups of flour, baking powder, and 4 tablespoons sugar. Rub in the 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 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.
- Preheat the oven to 375 degrees F (190 degrees C). Spoon the batter over the blueberries, leaving only a few small holes for the berries to peek through. Mix together the cinnamon and 2 teaspoons 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 – of course there will be blueberry syrup on the knife. Let cool until just warm before serving.