Fruit Cobbler

2 cups fresh blueberries
2/3 cup all-purpose flour
1/2 cup sugar
2 teaspoons baking powder
1/2 teaspoon salt
2/3 cup sugar
2/3 cup milk soured with 1 teaspoon lemon juice
1/4 cup butter

Mix blueberries and sugar together and set aside. Melt butter in a glass baking dish. Sift flour, baking powder and salt in a bowl. Add sugar to the flour mixture along with the milk and vanilla. Mix until moistened. Spoon batter into baking dish. Spoon blueberries into the center of the batter. Do not stir. Bake at 350 degrees until golden brown, about 50 minutes.