This can be caused by too low baking/steaming temperature or too short baking time. Alternatively, the recipe proportion of egg and milk is not adequate (too much milk for instance). Problem 2 – Flans have ugly bubbles all around it; also the inside is not smooth.

What happens if you overcooked Leche Flan?

What happens when you overcook Leche Flan? It's better to undercook slightly than overcook (as the flan will continue to cook once you remove from the oven.) Overcooking will result in an ugly, lumpy, or cottage-cheese texture with an eggy taste.

How do you know if flan is overcooked?

The flan will continue to cook once outside the oven and even in the cooling process. Overcooking yields an acne-like surface, with not so smooth texture and eggy taste. Hopefully, after making this recipe at least two times more, you will finally know and feel when the flan is ready.