Alexander's Blueberry Crisp

Preheat the oven to 350 degrees F (175 degrees C). Grease an 8-inch square baking dish with cooking spray.

Make filling: Combine blueberries, sugar, and flour in a large bowl. Toss gently until evenly coated. Pour into the prepared baking dish.

Make topping: Combine brown sugar, flour, oats, salt, cinnamon, and baking soda in a separate bowl. Cut in cold butter with 2 knives or a pastry blender until mixture resembles coarse crumbs. Sprinkle evenly over blueberry mixture.

Bake in the preheated oven until golden brown and bubbly, about 30 minutes.