• Preheat your oven to 375 degrees Fahrenheit.

Blueberry Base

• Spray a 9 by 13 inch baking dish with cooking spray. Add the blueberries, granulated sugar, lemon juice, and cinnamon. Stir to combine well. Set aside and let rest.
  8 cups frozen blueberries, 2/3 cup granulated sugar, 1/4 cup lemon juice, 1 teaspoon cinnamon

Crust

• In a mixing bowl whisk together the flour, baking powder, and salt. Set aside.
  2 1/2 cups all purpose flour, 1/2 tablespoon baking powder, 1/2 teaspoon table salt
• Using a stand mixer or a hand mixer, beat together the room temperature butter and granulated sugar. Beat until light and fluffy, about three to six minutes.
  12 tablespoons unsalted butter, 3/4 cup granulated sugar
• Beat in the milk, then the egg, and then the vanilla.
  1/4 cup milk, 1 egg, 1 teaspoon vanilla extract
• Add the flour mixture and beat until just combined. The dough batter will be very sticky.

Putting Together the Cobbler

• Add the blueberry mixture to the bottom of the prepared baking dish.
• Drop the dough on top. Bake for 50 to 60 minutes or until the dough is golden brown. Remove from the oven. Let sit until no longer hot, but still warm (20 to 30 minutes) and serve with vanilla ice cream.