Preheat the oven to 400 degrees.
In a medium mixing bowl, mix the gluten free flour, cornmeal, corn starch, Xanthan gum, baking powder, cumin, and salt. Using clean hands or a fork, cut in the butter. Then, add the milk and use a spoon or spatula to stir until a sticky dough is formed.
Spread batter in 2-3 greased ramekins and bake for 18-22 minutes. Allow to cool.
In a large mixing bowl, add the ground beef, pork, enchilada sauce, onion powder, garlic powder, egg whites, salt, and pepper. Next, crumble in the cornbread. Use clean hands or a spoon to mix until combined.
Scoop about 1/2 Tbsp. of the mixture and roll into a ball. Place meatballs on a parchment lined baking sheet. Then, bake for 20-24 minutes.