Preheat oven to 350°F (175°C).
In a bowl, mix almond flour, cocoa, baking powder, and salt.
In another bowl, whisk coconut oil, sweetener, almond milk, vanilla, and vinegar.
Combine wet and dry ingredients until smooth.
Pour batter into greased cake pan.
Bake 28-30 minutes; test with a toothpick. Cool completely.
Beat cream cheese, vegan butter, sweetener, and vanilla for frosting.
Spread frosting evenly over cooled cake. Slice and serve.