A 30-minute, no rising required S'mores-flavored cinnamon roll cake filled with miniature marshmallows, miniature chocolate chips, and graham cracker crumbs. This cake is covered in a marshmallow frosting that will melt in your mouth! Another day of S'mores week! And today we're kicking it off with a simple, thirty-minute, no yeast s'mores cinnamon roll cake.