Food: Up your s'mores game with homemade marshmallows

Have you noticed that all the fancy pastry shops have pretty bags of homemade marshmallows for you to buy?
I’ve bought these ribboned parcels in the name of “research,” just to see what the fuss is all about. Now I know. There really is nothing like the magnificence of a homemade marshmallow. Fluffy, yes, but with a toothsome density that’s terribly appealing. Once you taste these, you’ll never want to buy marshmallows again.
With Valentine’s Day just around t