Preheat the oven to 400 degrees F (204 degrees C). Grease a 10-inch cast iron skillet with butter.
In a large bowl, stir together the flour, baking powder, sweetener, and sea salt.
Stir in the melted butter, almond milk and eggs, until smooth. Stir in the sweet corn extract.
Transfer the batter into the skillet and smooth the top with a spatula. Bake for 35-40 minutes, until an inserted toothpick comes out clean and the top is golden brown
