Bewitched (1964)

S05E23 Tabitha's Weekend

Phyllis invites Tabitha to join her and Frank for a weekend, not anticipating that Samantha and Endora will also be present. Tensions rise as disagreements erupt among the group. In a moment of frustration, Tabitha transforms into a cookie. Samantha reassures her daughter that she isn't responsible for the chaos and encourages her to revert to her human form.