我剛剛也對布丁可以保存多久好奇，所以上網查了一下有沒有資料 (台灣那種比較接近flan，就是焦糖布丁)

I disagree. I have eaten flan that's been covered and refrigerated for 2 weeks. It was still tasty and it didn't upset my stomach at all.

In fact, when the flan hit 3 weeks, it still tasted good, but after eating a piece my stomach definitely made some weird noises.. Therefore, I would not recommend eating it after 1 - 2 weeks.

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........ I did some research on the shelf life of leche flan. Commercially produced flan keeps in the fridge for upto 30 days and homemade ones between 2 and 4 weeks. I say just make the flan as close to your hubby’s birthday as possible. ....

其實對於天然食物的保存，大概日常生活已經漸漸依賴人工添加物了
所以自然以為非人工添加物，想當然爾一定很短....其實未必

有回一票人去法國人加做客，吃crepe。她的果醬也是home made
於是我就問，home made 保存期限會比較短吧! 3~6個月? (我猜)
她說，其實不會，如果殺菌過程有做好，一年以上不會有問題.....