Fluffy marshmallows

Several years ago, I found this Smitten Kitchen recipe for marshmallows and I knew I had to try it. I had recently gotten a Kitchen Aid mixer and this was the perfect project to test it out with.  I successfully made a batch in my own tiny NYC kitchen - if I remember correctly, without a candy thermometer - which I am still amazed about. Anyway. I've only made these a few times because they are SO MESSY to make; I remembered that fact only after I made them a few weeks ago. But honestly? it was worth it. They are so delicious; so much springier and fluffier than store bought marshmallows and very adaptable, flavor-wise. This time, I used a few drops of green food coloring and peppermint extract in place of vanilla to make them minty. I like cutting them into larger-than-normal squares, creating a two-bite marshmallow.