Preheat the oven to 300°F.
Take a 15 x 10-inch rectangular pan and fix aluminum foil or parchment or butter paper.
Arrange the crackers on the prepared sheet in lines in a single layer.
Meanwhile, in a small saucepan over the stove, combine butter and brown sugar. Heat this mixture while watching the temperature closely with a candy thermometer. Boil this mixture. Raise the temperature of the mix to 270 to 290 degrees and stay at that temperature for 2 to 3 minutes.
Drop the mixture over the crackers immediately and then level it out with a spatula.
Bake until the candy sets, approximately about 5 minutes. Then take it out of the oven.
Microwave the chocolate chips in this timeframe at 50% power in 30-second increments. Cover with caramel that has hardened.
The chocolate chips as an alternative can be sprinkled on top of the hardened candy, melted in the oven, and then spread.
Using a spatula that has been oiled, incorporate the nuts or other toppings into the chocolate.
While warm, cut into squares. Allow it to cool entirely, at least for 15 minutes, and then preserve it in the refrigerator.