I've been making them for years because I found a recipe for them in Martha Stewart's Christmas: Entertaining Decorating and Giving,
a book I bought a million years ago when it was new. I probably bought it because of the marshmallow recipe (who ever heard of making them yourself? They're not food. It's amazing they're edible at all and not just playthings) but the book also contains an AMAZING recipe for egg nog. Serve that egg nog once and people will beg you to make it at every other occasion. They'll invite you over just so you'll bring the egg nog. As I recall there's an error in the marshmallow recipe (something like it doesn't say when to add the vanilla) but you can fake it.
These days I've been using recipes from this book:
Marshmallows: Homemade Gourmet Treats. This book is a comprehensive marshmallow manual. It has recipes for dozens of flavors, different marshmallow consistencies and - best of all - none of the recipes call for corn syrup.
You need a strong stand mixer if you're going to make 'shmallers (as I like to call them - obviously) You're not going to be able to whip up the searing-hot sugar batter with your hand-held. Other than that they are no harder to make than cake.
Then you can have yourself a good time decorating them as you wish:
Or you can spread the batter in a pan to cure then cut out shapes with a cookie cutter or knife. I wanted to play with a pastry bag.
Then you can foist them on unsuspecting visitors and their gluten-sensitive children. Or just whip them at people. Marshmallows make such a wonderful, soft smacking sound when they come in sharp contact with human skin.
Oh yes, and since you made them yourself and they couldn't be fresher they also taste really good.