peace offering
From Longman Dictionary of Contemporary Englishpeace offeringˈpeace ˌoffering noun [countable] SORRY/APOLOGIZEsomething you give to someone to show them that you are sorry and want to be friendly, after you have annoyed or upset themExamples from the Corpuspeace offering• Mike brought in some doughnuts - I think they were a sort of peace offering.