Grease an 8" baking pan. Mix 2 tablespoons corn syrup, brown sugar, and lemon juice in the pan. Sprinkle blueberries on top of mixture.
Mix sugar and milk in a bowl. Add egg, remaining corn syrup, and vanilla. Stir in flour, cornstarch, and baking powder, mix until smooth.
Spoon over berries. Bake at 350 degrees for 35 minutes or until toothpick inserted near center comes out clean. Do not over bake. Serve pieces up-side down on dessert plates. Top with blueberry sauce and whipped topping or ice cream.