Sharon, you are correct! I put the pans in the cold oven and turn it up to whatever temp the recipe calls for. I figure that way they heat up slowly (versus preheating the oven to 425 and putting them in the hot oven). I don't know if it really makes a difference, but that's the way I do it. Then, while the pan and the oven are heating up, I blend the batter. By the time I'm ready to pour the batter in the pan, the pan is nice and hot. As for when to grease the pan, I'm not sure that makes a difference either. I usually spray them with Pam after they are hot.