Preheat oven to 350°F. Generously spray a 9-inch round pie dish with cooking spray. A glass pie dish is recommended; baking times may vary with metal dishes.
In a large bowl, whisk together 1 cup granulated sugar, flour, cinnamon, and salt. Set aside.
In a medium microwave-safe bowl, melt the butter (about 45 seconds). Let it cool slightly before adding the eggs to prevent scrambling.
Add the eggs, vanilla extract, and almond extract to the melted butter and whisk to combine.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Gently fold in 2 cups of fresh blueberries. The batter will be thick.
Spread the batter evenly into the prepared pie dish, smoothing the top with a spatula.
Evenly sprinkle the remaining 1/4 cup of blueberries over the top of the batter.
Sprinkle the 2 tablespoons of granulated sugar evenly over the blueberries. Bake for 34-39 minutes, or until the edges are set and a toothpick inserted into the center comes out clean or with a few moist crumbs (no wet batter).
Allow the pie to cool in the dish on a wire rack before slicing and serving. It can be served warm or at room temperature. Optional: serve with whipped topping or ice cream. The pie will keep in an airtight container at room temperature for up to 5 days.
Notes
This crustless blueberry pie is incredibly versatile and can be enjoyed on its own or with a dollop of whipped cream or a scoop of vanilla ice cream. It's perfect for potlucks, picnics, or a simple weeknight dessert.