This is a multi-step recipe, and while non of them is complicated, they do require some planning ahead. The marshmallow needs at least 6 hours to set and the graham cracker dough needs about 1 hour of chilling time, so it's best to space the work over 2 days. This is what I did. The night before, I prepared the marshmallow and set the pan aside overnight. I then made the graham cookie dough, on that same night and left it to chill in the fridge overnight as well. The next morning, I cut out the marshmallows, baked the cookies, dipped and assembled them. However frozen cookie dough cut outs will keep in the freezer for weeks and the baked cookies keep well in an airtight container for several days, so these could be prepared in advance too.