Preheat oven and bake brownie batter in a greased 9-by-13-inch baking pan according to package directions.
While brownies are baking, make the pudding according to package directions and refrigerate to set.
When the brownies are done, keep them in the pan and allow the pan to cool completely.
Break up brownies into small pieces; place half in bottom of large glass trifle dish or serving bowl.
Cover with half of the pudding, then one-third of the crushed candy and half of the whipped topping.
To crush the candy, keep the bars in their wrappers, place on a cutting board and pound with a rolling pin.
After crushing, when you open each candy wrapper, you can easily sprinkle the little candy pieces wherever they need to go.
Repeat layers. Top with remaining crushed candy.
Cover and chill for at least two hours before serving.