A peace offering - Idioms by The Free Dictionary
a peace offering
An item or gesture extended to another person to express remorse or forgiveness. After they had their first big argument, Mark brought Monica a box of her favorite chocolate as a peace offering.
a ˈpeace offering a present that you give to somebody to show that you are sorry for something or want to make peace after an argument: He left her chocolates as a peace offering, hoping that she would forgive him.