Funny you should mention this, because one of the women in the class said her biggest challenge was trying to use less butter. She was raised on a farm, they had cows, so to her the taste of any subsitute is Wrong. I told her I was the opposite - we never had butter in the house, and it always tasted bland to me.

Looking at my notes, the nutritionist was complaining about hydroginated oils and trans-fatty acids. The margerine I use has the former but not the latter.