This sugar-free pistachio cake recipe is perfect for those who are watching their sugar intake. It's made with almond flour, coconut flour, and a sugar substitute like erythritol or stevia. The cake is moist, fluffy, and has a nutty flavor from the pistachios. The frosting is made with cream cheese and a sugar substitute, making it creamy and delicious. This recipe is also gluten-free and can be made keto-friendly by using a keto-friendly sweetener. Enjoy a slice of this sugar-free pistachio cake without the guilt!