SEIF 5 (Cont)
If someone makes Hamoitzie and realizes that he did not say Havdala yet, we Poskin differently than what was previously maintained about Kiddush, since Havdala cannot be made on bread. Rather, he should eat a small amount, so that his Hamoitzie would not be L'Vatala, then make Havdala.
The Magen Avraham says in the name of the Maharam that after Havdala it is necessary to make Hamoitzie again.