I've used the nutella/peanut butter method for regular pills, and it's good for hiding the taste/texture of the pills but much less good for hiding their shape, especially if the pill is large. There's also a non-zero amount of practice required to make sure that it's completely encased, that you don't accidentally expose it while swallowing, and so forth. I'd suggest practicing with vitamins/placebos first for a bit before you move on to the test.