Preheat waffle iron. In a large bowl, beat cream cheese until smooth.
Add eggs one at a time, beating well after each addition.
Mix in melted butter, heavy cream, and vanilla extract.
In separate bowl, combine almond flour, baking powder, erythritol, salt, and lemon zest.
Fold dry ingredients into wet mixture until just combined. Do not overmix.
Grease hot waffle iron well. Pour batter in portions and cook according to your iron's instructions (usually 4–5 minutes).
Serve immediately with fresh raspberries, a dollop of crème fraîche, and a dusting of powdered erythritol.