Preheat oven to 400 degrees.
Line cookie sheet with parchment paper.
Cover cookie sheet with one layer of saltine crackers.
Bring butter and brown sugar to a boil, stirring continuously for 2 to 3 minutes.
Remove from heat, add one teaspoon pure vanilla extract.
Pour mixture over crackers, then bake for 6 minutes.
Remove from oven, pour a bag of milk chocolate chips on top of crackers.
Allow to soften for a minute or two, then spread chocolate evenly on top of crackers.
Cool, then break up into bite-size pieces.
Optional - add nuts, sprinkles, or M & M's on top of melted chocolate.