Why do my cakes turn mouldy?

Why do my cakes turn mouldy? - Close Up Shot of Pastries on the Table

My cakes get really mouldy/sticky within days if I don't refrigerate them during rainy season or when it's too hot. My cakes pass the skewer test before coming out of oven. This has happened for most of the recipes I have tried.

I try to make my cakes with lesser sugar and wholewheat floor instead of white floor. My temperature knob is wrecked - takes twice as long to bake. Has any of it got anything to do with my cake rotting sooner?

Any thoughts?



Best Answer

This is completely normal. Cake is a perishable item, much like almost any prepared food. It will spoil if left out unprotected.

Although during the baking process, almost all bacteria and molds that are present in the batter will be killed or reduced to trivial numbers, there are still countless mold spores present in the air.

The cake can also absorb water from the air if it is very humid (you mentioned the rainy season).

If the cake does absorb water (as opposed to drying out and getting hard), it will present a hospitable environment to the mold spores that settle from the air, and they will begin to grow. Very warm conditions only help to accelerate this process.

This is essentially the same process described in the answer to this question: Is bread that can go mouldy better than that which does not?


Two of the best sources for shelf life agree that an non-refrigerated cake should last 1-2 days. These sources probably assume prevailing conditions in the US, including air conditioning in the summer. They are also looking at quality; cakes are also subject to staling.




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Quick Answer about "Why do my cakes turn mouldy?"

The cake can also absorb water from the air if it is very humid (you mentioned the rainy season). If the cake does absorb water (as opposed to drying out and getting hard), it will present a hospitable environment to the mold spores that settle from the air, and they will begin to grow.

How do I stop my cake going Mouldy?

The alcohol acts as a preservative that prevents the growth of mold. Fruit cakes that contain alcohol can last for several months and still be edible as long as they have been properly stored. The alcohol also adds moisture to the inside of the cake without making the outside moist and susceptible to mold growth.

How do you keep a cake from rotting?

Keep your cakes at the peak of freshness and quality by following a few key guidelines.
  • Store when completely cooled. ...
  • Store under cake cover or large bowl. ...
  • Freeze unfrosted cakes. ...
  • Freeze cakes with frosting. ...
  • Thaw cakes at room temperature.


  • How long does it take for cake to go Mouldy?

    The shelf life of cake depends on its preparation method and how it is stored. Typically, a cake can last up to four days without going bad or stale. When stored in the fridge, it can last up to 5 or 7 days. Frozen cake lasts longer but is best consumed after 2 to 3 months in the freezer.



    Top 5 Cake Baking Mistakes! | Preppy Kitchen




    More answers regarding why do my cakes turn mouldy?

    Answer 2

    When I use less sugar in recipes, my cakes also turn mouldy within 2days max!! So maybe sugar helps in preserving cakes

    Answer 3

    Sugar helps to preserve cake. What you would need to reduce are the invert sugars or glucose, as they tend to increase the moisture of the cake and can make it prone to mold attack when the surrounding temperature increases.

    Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

    Images: Shiva Kumar Reddy, Silvia Trigo, Stephen Niemeier, Pixabay