Preheat oven to 350 degrees. Line a cookie sheet with parchment paper, then line with crackers.
In a saucepan, over medium heat melt butter, then add brown sugar. Boil 3 minutes. Remove from heat and pour over crackers.
Place sheet pan in the oven and bake for 5 minutes. Mixture will be bubbling. Remove from the oven and sprinkle with chocolate chips. With a knife or spatula, spread melting chips, like frosting a cake.
Cool one hour and break/cut into pieces. Tightly cover leftovers and keep in the refrigerator.