Keto Brownies

Ingredients
For the cake:

1 cup of butter.
½ cup of cocoa.
2 cups of almond flour.
2 cups of erythritol or your preferred keto-friendly sweetener
4 eggs.
4 tsps of vanilla.
1 cup of chopped nuts.
You’ll Need (for the icing):
¼ cup of softened butter.
¼ cup of almond milk.
¼ cup of cocoa.
3 cups of powdered erythritol.
A dash of salt.