There are several synonyms for the phrase "gotten one's just desserts." One alternative could be "reap what you sow," which means to face the consequences of one's actions. Another synonym is "get what's coming to you," which implies that you will receive what you deserve, whether good or bad. Another phrase is "getting what you asked for," suggesting that the outcome is a result of one's own choices. Finally, "getting one's comeuppance" is another synonym for "gotten one's just desserts" and refers to receiving a punishment or correction for wrongdoings. Regardless of which phrase is used, the underlying meaning remains the same: receiving an appropriate outcome based on one's behavior.