1. Cut left over chocolate cake until it resembles into fine crumbs.
2. In a bowl, combine chocolate cake crumbs, butter oil substitute, light corn syrup and rum. You may add more rum if needed.
3. Mix or blend until it forms a single mass.
4. Scoop a spoon-full of the mixture and form into a ball.
5. Dip each chocolate cake ball into melted chocolate and coat with colored candy sprinkle.
6. Allow to set at refrigerated temperature.