Preheat the oven to 350°F (175°C) and grease a 9-inch cake pan.

In a large mixing bowl, combine dry ingredients: almond flour, cocoa powder, erythritol, baking soda, and salt.

In another bowl, mix together the almond milk, melted coconut oil, and vanilla extract.

Pour the wet mixture into the dry ingredients and stir until just combined.

Transfer the batter to the prepared cake pan and smooth the top with a spatula.

Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted comes out clean.

Once baked, remove the cake from the oven and allow it to cool in the pan for 10 minutes before transferring it to a wire rack.

Let the cake cool completely before frosting or serving.