Butterfinger Rum Cake

Name: Butterfinger Rum Cake
Cuisine: European
Ingredients: 1/2 tsp sugar; 1/2 cup water; 1 package yellow cake mix; 1/2 cup oil; 1 small package butterscotch instant pudding; 1/2 cup butterscotch schnapps; 4 large eggs; 5 full size butterfinger candy bars crushed; rum sauce ingredients; 1 cup sugar (rum sauce); 1/2 cup butter (rum sauce); 1/4 cup coconut rum or your favorite rum (rum sauce); 1/4 cup butterscotch schnapps (rum sauce)