Toffee Brownie Trifle* -       1 package fudge brownie mix (13-inch x 9-inch pan size)      2-1/2 cups cold milk      1 package (3.4 ounces) instant cheesecake or vanilla pudding mix      1 package (3.3 ounces) instant white chocolate pudding mix      1 carton (8 ounces) frozen whipped topping, thawed      2 to 3 Heath candy bars (1.4 ounces each), chopped