Preheat the oven to 400°F and grease a cast iron skillet (I used a 10 inch one) with melted butter (use extra butter, not from the recipe ingredients).
In a medium bowl, combine the almond flour, sweetener, salt, and the baking powder. Mix really well.
Add the almond milk, eggs, and melted butter to the dry ingredients. Mix until a smooth batter forms.
Pour the batter into the greased cast iron skillet. Bake in the preheated oven for about 35 minutes, or until golden brown. A toothpick inserted in the center should come out clean.
Let it cool for at least 30-40 minutes before serving. Yummy, enjoy!