Grab a roll of Ritz crackers, a handful of chocolate pieces (chips, a broken bar, etc) and a bag of marshmallows. This is how it goes down in my house. I grab a microwave safe dish and melt the chocolate by microwaving it 20-30 seconds at a time and stirring in between. It will be smooth and glossy when it is ready. I lay the ritz down on some parchment or a clean counter and use a spoon to spread enough chocolate on the crackers to cover one side. They'll cool a bit while you're getting the marshmallows ready. I then line a baking sheet with parchment paper (I used foil for this, but parchment works better) and put marshmallows on it, keeping them far away enough that when they melt a little and spread, they wont melt together in one big blob. I turn on the broiler and put the marshmallows in. Watch them closely!!! Using the broiler, these can burn in seconds flat.
There have been times when Im broiling and I check them and they are just getting tan in color, and then seriously, 10 seconds later they are burnt to a crisp. Do not walk away from the oven while its broiling the marshmallows!
When they are done enough for your liking, take them out and scoop a marshmallow onto each chocolate covered cracker. Then top with either a plain ritz, or another chocolate covered one. I find that I like a little less sweet and a little extra saltiness, so I leave the top Ritz plain.