While I was expecting to have properly inflated muffins shaped like mushrooms, I muffins whose surface remains flat, cylinder shaped where the dough rise and ended up going out to the side like lava! Both say they are absolutely ugly (see photo)! I tested with my usual silicone mold (purchased from Carrefour) with the same dough just before, and the result was quite different: the muffins were well shaped mushrooms. Obviously this has a Tefal pan heat distribution problem and I can not recommend it !!