Thanks Mimi, Pretty Cake & Cowtown Brewste.
And Yes Cowtown, like what u've said, by adding shortening, it creates this sensation mouth being covered of a 'film' of fat which is not that nice in terms of taste too.. I will try out one without it in my next try.
Thanks all (Mimi, Pretty Cake & Cowtown) a lot, it helps me a lot. Right now I'm trying out how to create a better taste buttercream, I'm an amateur in baking thus everything is a challenge for me but it is my dream to bake good pastries.. Nice to make acquaintances with u all...