Spray two 9-inch round cake pan with nonstick baking spray.
In a large bowl, cream together butter, sugar, and eggs until smooth and creamy.
Add almond flour, coconut flour, IsaLean Shake, baking powder, and salt. Mix until combined. Add almond milk, and mix just until batter is smooth.
Spoon mixture into the prepared pan.
Bake at 350 F for 20-24 minutes or until a toothpick inserted into the center comes out clean.
Cool completely. Frost with desired frosting, coconut cream, whipped cream, or buttercream.