A couple of weeks ago, on my birthday, I started taking an online creative baking class. The class is taught by Christina Tosi of Milk Bar—which, if you’re not familiar, is a chain of bakeries with amazing, unique treats that are ridiculously addictive. Over the course of a month we’re baking a few classic Milk Bar treats, then learning Christina’s prototyping method to develop our own unique creations. These Popcorn & Hot Chocolate Cookies were my first project. Sunday Night at Grandma’s House We were tasked with making a cookie based on a specific time—it could be a time in our lives, a time of year, a time of day…whatever…