i am a retired Chef and for the last 3 years I have been Vegan, which means that I use no animal products of any kind.Soy milk gets substituted for milk, margarine for butter , etc. My problem is egg substitution, I have used vinegar, flax seed, Enery G, soy flour, applesauce, banana and my product is flat. I have a professional kitchen Aid so aeration is not the problem. does anyone have a suggestion for me? Thanks so much!