1 box (9x13) brownie or chocolate cake mix (prepared according to the directions and cooled)
2 - 3.4oz boxes of Instant Chocolate Pudding (prepare according to directions)
1 - 16oz frozen Cool Whip (thawed)
1 - 8oz package Heath English Toffee Bits (or several Heath Bars crushed)
Prepare & bake brownie mix according to the directions on the box. Let it cool
Prepare the pudding according to the directions on the box
In a large trifle bowl layer 1/2 of the brownie mix (crumbled), 1/2 of the chocolate pudding, 1/3 of the toffee bits, 1/2 of the cool whip. repeat. Sprinkle the remaining toffee bits as the last layer.
Refrigerate for at least a couple of hours (preferably overnight).