
Preheat oven to 350 degrees. Spray a 10 inch cast iron skillet or 8x8 baking dish with non-stick spray.
Add the melted butter, cream, and eggs to a mixing bowl and whisk to combine.
Add the coconut flour, sugar substitute, salt, and baking soda to the bowl and stir well to combine.
Spread the mixture into the prepared dish and bake for 15-20 minutes or until the edges are golden and a tester comes out clean.