Fondant sweating and cracking in a Bengaluru kitchen: what stops it

A slab of fondant that looks perfect at noon can turn glossy and wet by four in the afternoon in a Bengaluru kitchen. The sugar has not spoiled. It has pulled moisture straight out of the air, and Bengaluru's air holds a lot more of it in some months than others. Climate records built from India Meteorological Department station data put the city's average relative humidity at roughly 45 percent in March and close to 80 percent in August, a swing wide enough to turn one fondant recipe from workable to soup depending on the week you use it.

Why sugar behaves like this in the first place

Fondant is mostly sugar, and sugar is hygroscopic. It draws water vapour out of humid air and holds onto it rather than letting it evaporate back off. Above roughly 60 percent relative humidity, that pull gets strong enough to show up as a wet sheen on the surface within an hour or two. The same chemistry runs the other way too: in a dry month like March, fondant loses moisture to the air instead and turns brittle at the edges, cracking where it is folded tightest around a corner or a dowel hole.

The fridge makes the same problem worse rather than better. A cake covered in fondant and moved into a fridge cools the sugar surface below the room's dew point. The moment that cake comes back out into a warm, humid Bengaluru room, water condenses on the cold surface exactly the way it beads on a cold glass. Bakers who blame the fondant brand are usually blaming the wrong thing: two different brands cooled and reheated the same way will sweat about the same amount, because the condensation is a property of the temperature gap, not the sugar mix.

What stops the sweating, and what only hides it

Wiping a sweating cake with a cloth or tissue is the instinct, and it is close to the worst option available. Cake artist Sharon Wee's guidance on the problem is blunt about this: wiping smears the moisture into the fondant's surface instead of removing it, leaving a dull patch that will not fully recover. The fix that clears the sheen is patience, letting the cake return to room temperature gradually in a covered box so the condensation can re-evaporate rather than sit on the surface. A small fan pointed near the cake, not directly on it, speeds that evaporation without disturbing the surface the way wiping does.

A light dusting of cornflour or icing sugar over the surface before the humid part of the day gives the moisture something to sit on besides the fondant itself, and it brushes off cleanly once the air dries out again. Running a dehumidifier or air conditioner in the room where a cake sits, rather than only in the kitchen where it was made, matters more in Bengaluru than the recipe does: the same fondant behaves completely differently in a 45 percent room than in an 80 percent one.

Timing the work instead of fighting the whole afternoon

Bengaluru's humidity is not flat across a single day any more than it is flat across the year. Early morning hours, before the afternoon heat builds, tend to run cooler and often drier than the four to six p.m. window many home bakers default to because it fits around a day job. Covering finished sugar work immediately, rather than leaving it out to set the way a drier climate might allow, protects the surface during the exact hours humidity climbs. None of this is about owning better equipment. It is about working with the hours the city gives you, not the ones a recipe written somewhere drier assumes.

A cheap hygrometer kept on the workspace tells you more than a wall calendar's monsoon dates. The reading inside a closed kitchen with the stove running can sit ten points above whatever is happening outside the window, and that gap is what breaks a recipe that worked fine in the same city the week before.

Where this skill gets taught

Sugarcraft and fondant work are not a footnote at Doodles Baking Institute in HBR Layout. The 6-month Advanced Diploma sets aside dedicated time for cake artistry alongside French patisserie and chocolate work, precisely because a student who can only laminate a croissant will still lose a wedding order to humidity damage on the cake board. Shorter formats matter here too. The 1-month Commercial Baking Diploma and the 2.5-month Advanced Module both fold basic sugar handling into their coursework, so the fixes above are not theory a student reads once and forgets by the next humid week.

Frequently asked questions

Q: Does refrigerating a fondant cake stop it from sweating in Bengaluru?

No. Refrigeration causes the sweating rather than preventing it, because the cold surface condenses room moisture the moment it comes back out. Keep a finished fondant cake at a stable room temperature in an air-conditioned space instead, and refrigerate only the unfrosted cake layers before assembly.

Q: What is the fastest fix for fondant that is already sweating before an event?

Move it to the coolest, driest room available and let it sit uncovered for 15 to 20 minutes so the surface moisture evaporates on its own. Do not wipe it. A small fan aimed nearby speeds this up without touching the surface.

Q: Does dusting cornflour over fondant stop it from sweating?

It helps rather than stops it outright. Cornflour or icing sugar absorbs surface moisture and can be brushed off once conditions dry out, but it will not prevent sweating in a room running above roughly 70 percent humidity without added dehumidification.

Q: Is gum paste less prone to sweating than regular fondant in humid weather?

Gum paste contains added gum, typically tylose or CMC, that stiffens it and lowers its moisture content compared with standard fondant. That makes it more humidity-resistant for decorations like flowers, but it also dries and cracks faster, so it is not a straight substitute for covering a whole cake.