In a large bowl stir together the cornstarch, sifted, and the granulated sugar and add the blueberries and the lemon juice. Toss the mixture until
It is combined well and transfer it to a buttered 10-inch (6-cup) deep- dish pie plate. In a bowl combine well the flour, the brown sugar, forced
Through a sieve, the baking powder, the salt, and the cinnamon, add the butter, and blend the mixture until it resembles coarse meal.
Add 1/4 cup
Plus 2 tablespoons boiling water and stir the mixture until it just forms a dough. Drop 1/4 cupfuls of the dough over the blueberry mixture and bake the cobbler on a baking sheet in the middle of a preheated 400F.Oven for 30 to 40 minutes, or until the topping is golden and cooked through.