Preheat oven to 400° F.

Line a half sheet jelly roll pan with foil and spray with cooking spray. Line the pan with a layer of saltines, salted side up.

In a saucepan, melt the butter and brown sugar together. Allow the mixture to boil for a few minutes to form a caramel, stirring to keep from burning. Pour the caramel evenly over the saltines. Place the pan in the preheated oven for 5 minutes until the caramel is bubbling.

If you are using chocolate bars, break the bars into smaller pieces. When the pan comes out of the oven, spread the chocolate pieces over the caramel. When the chocolate has melted slightly, spread evenly over the caramel until completely coated. Sprinkle toppings over the top of the chocolate and gently press down to stick.

Let pan cool at room temperature then place in the refrigerator to set.

Once the candy is set, break into small pieces and keep in an air tight container.