Separate the eggs and whip the egg whites with a mixer until soft peaks form.
In a separate bowl, mix almond flour, baking powder, sweetener, and salt. Stir to combine.
Add the dry ingredients to the egg yolks, then mix in nut milk and melted butter.
Gently fold in one-third of the egg whites, then repeat until fully combined. Avoid overmixing.
Preheat the aebleskiver pan over medium-low heat. Ensure it's fully heated before greasing.
Fill each well ⅓ full, then add ½ teaspoon of jam or chocolate (if using). Cover with more batter, filling ⅔ full as they will expand.
Cook for 1-2 minutes, then use a pointed tool like a chopstick or skewer to flip each pancake ball.
Cook for another 1-2 minutes until golden brown. Remove from heat and serve warm.