In a large bowl, add gluten-free flour, almond flour, cornmeal, sugar, baking powder, salt, and flaxseed. Mix well and set aside.
In a separate bowl, add wet ingredients like vegan butter and soy milk. Mix well and pour the mixture into the dry ingredients.
Mix well using a spatula until the ingredients combine well.
Add blueberries and gently fold the mixture.
Pour the mixture into an 8-inch round springform pan and smooth the top using a spatula.
Place the baking dish in a preheated oven at 375-degree F for about 50-60 minutes.
Insert the toothpick or fork; if it comes out clean, remove pan from the oven and let it cool for 10 minutes.