1 (19 ounce) package white cake mix
1 (6 ounce) package powdered non-dairy creamer
1/4 cup unflavored gelatin
4 cups miniature marshmallows
1/2 cup butter flavored rum
1 cup white sugar
2 cups vanilla extract
2 tablespoons milk
Prepare cake according to package directions. Mix powdered creamer and gelatin; pour into pan along center. Lift edges away from sides of pan.
Bake at 375 degrees F for 1 hour. Cool completely. Fill 12-cup glasses with pudding batter.
To make Topping: In small mixing bowl, mix marshmallows, butter flavoring and sugar until smooth. Fold marshmallows and sugar into chocolate mixture. Spread over pudding layer.