Who needs a campfire, anyway? For that matter, who needs graham crackers? I wouldn’t serve them up with a pot of tea it’s like good bread; if I’m going to eat a sticky chocolate marshmallow sandwich, it ought to be between cookies I actually like.
To make indoor s’mores, put as many cookies as you want onto a cookie sheet, and top each with a large marshmallow (or two). Put them under the broiler for a few minutes, until dark golden and crispy on top, then take them out, top each with a thin square of chocolate (Lindt 70% cocoa works great) and top with another cookie; the chocolate will melt with the heat of the marshmallow. Yum.