My grandpa loved burnt cookies. That last pan that got forgotten in the oven, the extra crispy ones with the hard brown edges that no one else wanted to eat, those were his favorites. When my grandparents came to visit, he always had the same question for my mom. “Got any burnt cookies?” At first I thought he was joking or just trying to make my mom feel better if she’d burnt any. But as I grew up, I realized that my grandpa was actually serious. One of thirteen siblings, his mom was just a little busy and burnt cookies were often the result. Strangely, Grandpa not only got used…