Preheat oven to 425 degrees. Cream egg, sugar, and oil together.Add dry ingredients, milk, and cinnamon. Fold in blueberries.Pour into a greased 8X8 cake pan. Sprinkle on topping. Bake for 20-25 minutes.Notes: You can use an all purpose Gluten Free flour like Namaste, which does not require the xanthum gum. It also tastes great. Since recipes with gluten free flour tend to be a little dry, you want a little extra liquid. Using Agave syrup not only has the benefit of cutting down the sugar content, but it is also liquid, which helps add moisture. If you use regular sugar, I encourage you to add either more milk or perhaps some extra egg whites.