Step 1

Spread blueberries in the bottom of a 9 x 9 baking dish. In a bowl whisk together all-purpose flour and baking powder, add sugar to flour along with milk, melted butter and vanilla extract. Stir all ingredients with a spoon and spread over blueberries in baking dish.

Step 2

Combine the 1/2 cup sugar, the cornstarch and the salt and sprinkle over the flour mixture. Do not stir, just sprinkle on. Boil the 1/2 cup water and pour over all the ingredients. Do not stir.

Step 3

Bake in preheated 350 degree oven for 40 to 45 minutes. Brown top under broiler the last couple of minutes.