And yet another error. Sorry!
I used to use my Mom's old heavy steel muffin tins. The original cooking time in those heavy and weathered tins was perfect. I recently bought some thin, nonstick muffin pans. I found out the hard way that the cooking time should have been scaled down. I burned them at 40 minutes. Garbage. I had to remake them and I found out that 20 to 25 minutes is PERFECT. However, they aren't golden. They are blonde.
Sorry if I cost you any bad batches.