It's truly amazing that I haven't learned my lesson yet. I've lived in this apartment for nearly 10 months, and I haven't yet come to terms with the fact that my oven is a gaseous beast from hell. The thing generally runs about 50 degrees too hot, and when left to its own devices (if the oven door isn't opened at regular 20 minute intervals), the heat continually increases from there. I've lost dozens of baking experiments to that oven, and these lemon cranberry muffins are no exception. I was planning to take these to a friend's brunch tomorrow morning, but I've been thwarted.
Do not adjust your monitors. The bottom of that muffin is (unfortunately) black.
Now, I'm out of cranberries and lemon zest. What's plan B?