Most of the pleasure in a dessert comes in the first three bites. After that, you should stop eating it. As a reward, you can eat dessert more often because you don’t binge it.
The first three bites of dessert are usually the best. After that, you should stop eating. This way, you can have dessert more often without overeating at once.
I hate wasting food, so I cannot follow this advice in practice. But a workaround to avoid getting hit by the diminishing marginal returns can be to share every dessert with others (or swallow every dessert in three bites).