Double, Double Toil and Trouble (1993)

The Farmer family is so deeply in debt that they might soon lose their house. Kelly and Lynn, the 7-year-old twin daughters, decide to not let this happen. They discover that a mean, shrewd somebody is responsible for all their family's problems: their Aunt Agatha. She has supernatural abilities but unfortunately uses them to do superbad things. She is malicious and loves to injure others, even her own family. Can the girls overpower such evil?