This low-carb apple cake is a perfect dessert for those who want to watch their carb intake. Made with almond flour, coconut flour, and erythritol, this cake is low in carbs and high in fiber. The apples add natural sweetness and fiber to the cake, while the almond and coconut flour add a nutty flavor. Serve it with a dollop of whipped cream or cream cheese frosting for a delicious and healthy treat.