Preheat your oven to 375°F (190°C). Grease a 9-inch square or round baking dish.
In a large bowl, whisk together the gluten-free cornmeal, gluten-free flour blend, baking powder, salt, and baking soda. Set aside.
In another bowl, whisk together the eggs, buttermilk, and melted butter.
Pour the wet ingredients into the dry ingredients and stir until just combined, do not over mix.
Pour the batter into the prepared baking dish and spread evenly. Bake in the preheated oven for 20-25 minutes, or until the top is golden and a toothpick inserted into the center comes out clean.
Let the cornbread cool completely, then cut it into cubes. Toast the cubes in the oven at 300°F (150°C) for about 20-30 minutes, stirring occasionally until dried.