In a medium bowl, combine almond flour, grated Parmesan cheese, baking powder, smoked paprika, garlic powder, salt, and pepper.
In another bowl, whisk together the eggs and heavy cream.
Dip each onion ring in the wet egg mixture, then coat evenly with the dry mixture, pressing it on. Arrange the rings in a single layer in your air fryer basket. Lightly spray with cooking spray.
Air fry at 350°F for 6 minutes, then carefully flip them, spray them again, and cook for another 4 minutes until golden and crisp. Serve with your favorite keto-friendly dipping sauce.