1 box chocolate cake mix (recommended: Duncan Hines)
1/2 cup coffee liqueur
2 cups fudge sauce, recipe follows, or 1 (16-ounce) jar fudge sauce
3 chocolate covered toffee candy bars, broken into pieces
1 1/2 cups heavy cream whipped and sweetened with 1/3 cup sugar
1 (4-ounce) bar German chocolate
1/2-ounce unsweetened chocolate
8 tablespoons (1 stick) butter
3 cups powdered sugar
1 2/3 cups evaporated milk
1 1/4 teaspoons vanilla
Assemble the trifle shortly before serving or it will get soggy.