Serves 6 to 8
While the blueberries are baking, prepare the ingredients for the topping, but do not stir the wet ingredients into the dry ingredients until just before the berries come out of the oven. A standard or deep-dish 9-inch pie pan works well; an 8-inch square baking dish can also be used. Vanilla ice cream or lightly sweetened whipped cream is a perfect accompaniment. To reheat leftovers, put the cobbler in a 350-degree oven for 10 to 15 minutes, until heated through.
½ cup (3½ ounces) sugar
1 tablespoon cornstarch
Pinch ground cinnamon
6 cups (30 ounces) fresh blueberries, rinsed and picked over
1½ teaspoons grated zest and 1 tablespoon juice from 1 lemon
1 cup (5 ounces) unbleached all-purpose flour
¼ cup (1¾ ounces) plus 2 teaspoons sugar
2 tablespoons stone-ground cornmeal
2 teaspoons baking powder
¼ teaspoon baking soda
¼ teaspoon salt
4 tablespoons (½ stick) unsalted butter, melted
2/3 cup buttermilk
½ teaspoon vanilla extract
⅛ teaspoon ground cinnamon
1. Adjust an oven rack to the lower-middle position and heat the oven to 375 degrees.
2. For the filling: Stir the sugar, cornstarch, cinnamon, and salt together in a large bowl. Add the berries and mix gently with a rubber spatula until evenly coated; add the lemon zest and juice and mix to combine. Transfer the berry mixture to a 9-inch glass pie plate, place the pie plate on a rimmed baking sheet, and bake until the filling is hot and bubbling around the edges, about 25 minutes.
3. For the biscuit topping: Meanwhile, whisk the flour, the ¼ cup of the sugar, cornmeal, baking powder, baking soda, and salt in a large bowl to combine. Whisk the melted butter, buttermilk, and vanilla together in a small bowl. Mix the remaining 2 teaspoons sugar with the cinnamon in a second small bowl and set aside. One minute before the berries come out of the oven, add the wet ingredients to the dry ingredients; stir with a rubber spatula until just combined and no dry pockets remain.
4. To assemble and bake the cobbler: Remove the berries from the oven; increase the oven temperature to 425 degrees. Pinch off 8 equal pieces of biscuit dough and place them on the hot berry filling, spacing them at least ½ inch apart (they should not touch). Sprinkle each mound of dough with cinnamon sugar. Bake until the filling is bubbling and the biscuits are golden brown on top and cooked through, 15 to 18 minutes. Cool the cobbler on a wire rack 20 minutes and serve.