Preheat the oven to 180°C (356°F).
In a bowl, combine cocoa powder and almond flour.
Add erythritol, baking powder, and salt.
Add eggs, unsweetened almond milk, and coconut oil, and mix well until combined.
Pour the batter into a pan lined with parchment paper.
Bake in the oven at 180°C (356°F) for 20 minutes.
Let it cool completely, then cut into pieces.