completely cover a cookie sheet with aluminum foil and preheat oven to 400 degrees F
cover the cookie sheet with the saltines in a single layer
stir the butter and sugar together in a saucepan for about 2-4 minutes while it boils
pour the butter/sugar over the saltines and spread it to cover them
put it in the oven for about 5 minutes
take it out and sprinkle chocolate or whatever else you want on top. (nuts etc...ugh i hate nuts though) whatever floats your boat!
wait for it to cool or put it in your fridge/freezer if it fits. to serve, you can break it into pieces.