Preheat oven according to cake-mix directions. Prepare mix according to package directions except use only 1 cup of water. Stir in liqueur; blend well. Spray two 9-inch round cake pans with baking spray. Bake according to package directions or until cake tests done.
Cool cakes in pans for 10 minutes, and then transfer to wire racks. Cool completely, about 15 minutes. Place one cake layer onto cake plate. Top with pudding, spreading evenly. Place remaining cake layer over pudding. Chill in refrigerator 2 hours.
Heat cream just to simmer in heavy saucepan. Remove from heat. Whisk in chocolate; stir until chocolate is completely melted and smooth.
Pour chocolate mixture over chilled cake, allowing it to drizzle down sides of cake. Sprinkle with toffee bits.
Amount per Serving
% Daily Value*
* Percent Daily Values are based on a 2,000 calorie diet.