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When I say caramel I mean the caramel pigments that food industries use to color food and drinks. Caramel pigment is a burnt caramel. I am sure that you have noticed that when we burn any food its taste change to bitter!! thanks for your comment. In a new start it is important to read possitive comments!

That explains it.
Once again I wish you good luck on this new series of food chemistry...and I'm waiting to taste some of it in a future steemeet :P