Ingredients

1 (19.8-ounce) package fudge brownie mix
1 (3.5-ounce) package instant chocolate mousse mix
9 (1.4-ounce) Heath candy bars, crushed
1 (12-ounce) carton whipped topping (such as Cool Whip) thawed

Directions

Prepare brownie mix and bake according to package directions in a 9-by-13-inch pan. Cool and crumble. Prepare chocolate mousse according to package directions, but do not chill.

Place half the crumbled brownies in a 3-quart trifle dish or large glass bowl. Top with half the mousse, half the crushed candy bars, and half the whipped topping. Repeat layers with remaining ingredients, ending with whipped topping. Garnish with chocolate curls, if desired. Chill 8 hours. Serves 16-18.