Dark Chocolate Roll Cake With Marshmallow Filling

"Do you know what today is? It's #NationalChocolateDay, and I've got the perfect thing to celebrate! It's a giant homemade version of a junk-food favorite: the Swiss Cake Roll. With a rich chocolate cake, fluffy marshmallow filling, and a dark chocolate glaze to finish it all off, it's the perfect nostalgic treat to make your inner child oh-so-happy. "