Combine together the erythritol and cocoa powder. Put the bowl aside. Reserve 1 tsp of this mixture for serving (optional).
Prepare another bowl to beat the eggs in. Whisk until soft so that the lava cake will rise when baking.
Pour the beaten egg into the erythritol and cocoa powder. Include the baking powder, vanilla, and cream into the mix as well. Stir together then flavor with salt.
Grease 2 muffin cups. Gently distribute and pour the batter into the cups. Let it bake in the oven for 10 minutes. Remember not to overbake the lava cake to obtain the soft consistency in the center.
Remove from the oven and serve on a plate, sprinkled with reserved cocoa-erythritol mixture (optional).
Video
Notes
The ingredients are enough to make 2 servings. You can make 2 small cakes or 1 big cake and cut in half to serve.