Trivia moment. I like my English muffins buttered and then toasted under the broiler. They come out crispier that way, than running them thru the toaster.
Several years experience showed that the muffins came out golden brown if I set the kitchen timer to exactly 7 minutes.
Last couple of days, golden brown has become dark brown with blackened edges. I've backed off to 6 minutes on the kitchen timer to recover the golden brown.
Same oven, same timer, same kitchen, same broiler. Could it be that PSNH has jacked up the voltage coming into the house? I never measured my line voltage so I'd never know if I measured it now. Line voltage anywhere between 110 and 130 is legitimate these days, and stuff that cares about line voltage has electronic regulation built into the product.
Plain old electric ranges don't care. They do run a little hotter if the line voltage is higher, but except for toasting muffins, it doesn't matter.