When I was a kid, my mom constantly used her muffin pan. Around when my kids were 10 years old, though, I realized that my own muffin tins were sitting idle, taking up space, and not living up to my mom’s 1970s and ’80s precedent. I considered how many times I’d actually used my muffin pan. For birthdays and class parties? That was basically it, right? And then it hit me: My mom had made almost anything in her well-worn muffin tins.