Keto Chocolate Cake

Name: Keto Chocolate Cake
Ingredients: 4 large Eggs (at room temperature); 1/2 cup Melted butter; 2 tablespoon Unsweetened Almond Milk; 1 teaspoon Vanilla Extract; 1 1/4 cup Almond Flour; 1/2 cup Granulated Sweetener (I used erythritol for a keto cake); 1/3 cup + 2 tablespoons Unsweetened Cocoa Powder; 1 1/2 teaspoon Baking Powder; 1 cup Unsalted Butter (or dairy-free butter, soft, out of the fridge for 3 hours at least); 1 cup Almond Butter; 1/3 cup Unsweetened Cocoa Powder; 1/3 cup Powdered Erythritol (I used powdered erythritol or icing sugar if not keto); 1/4 cup Unsweetened Almond Milk (at room temperature, not cold!)