Fondant stays soft when you block air exposure, control temperature, and add a little fat. Whether you’re storing leftover fondant for weeks or trying to keep it pliable during a long decorating session, the core principle is the same: moisture loss is the enemy. Here’s how to prevent it at every stage.
Storage That Actually Works
The best method uses three layers of protection. First, rub a thin coating of vegetable shortening over the surface of your fondant. This creates a moisture barrier that slows evaporation. Next, wrap the fondant tightly in plastic wrap, pressing out as much air as possible. Finally, place the wrapped fondant inside an airtight container or resealable plastic bag.
Store it at room temperature. The ideal range is 68°F to 72°F (20°C to 22°C) in a spot away from direct sunlight or heat sources. Properly stored fondant keeps for several weeks, sometimes longer depending on the brand. Every time you open the container to use some, re-wrap and re-seal whatever is left.
Keep It Covered While You Work
Fondant starts drying the moment it hits open air. If you’re rolling out a large batch, only take what you need and keep the rest wrapped in plastic or tucked in a bag. Even a few minutes of exposure on a dry day can form a crust on the surface.
Before you start rolling, knead the fondant until it feels soft and pliable. Dust your work surface lightly with powdered sugar, cornstarch, or a thin layer of vegetable shortening to prevent sticking. Shortening is the better choice if you live in a dry climate, since cornstarch and powdered sugar can pull moisture from the fondant. Keep the fondant moving as you roll, turning it a quarter turn periodically, but never flip it over. Coat your hands in shortening or wear food-safe gloves to avoid adding body heat and oils that can change the texture.
Why You Should Avoid the Fridge
Refrigerating fondant, whether on a cake or as a standalone piece, creates a condensation problem. When cold fondant moves into warm air, moisture from the room condenses on its surface. This makes the fondant sticky, shiny, and difficult to handle. The sugars dissolve slightly, ruining smooth finishes and sharp details.
If you have no choice because your cake has a dairy-based filling that needs refrigeration, keep the cake in its box when you remove it from the fridge. Let it come to room temperature gradually, still inside the box. Don’t touch the fondant while it sweats. The moisture will evaporate on its own once the temperature equalizes, usually over the course of an hour or two.
Freezing: A Last Resort
Freezing fondant is not ideal. The freeze-thaw cycle can change its structure, leaving it either sticky or grainy. If you need to freeze pre-made decorations or a fondant-covered cake, wrap everything tightly in plastic wrap and seal it in an airtight container. Freeze it flat if possible.
Thawing is where most people go wrong. Move the wrapped fondant from the freezer to the refrigerator and leave it for 12 to 24 hours. Then let it sit at room temperature, still wrapped, for several more hours. Do not unwrap it until it’s completely thawed. This forces condensation to form on the outside of the wrapping rather than on the fondant itself.
How to Revive Fondant That’s Already Hard
If your fondant has dried out, you can usually bring it back. Start by microwaving it for 5 to 7 seconds. That brief burst of warmth softens the sugars just enough to make the fondant workable again. Check it, and if it’s still stiff, give it another 5-second pulse. Overheating will melt it into a sticky mess, so keep the intervals short.
Once it’s slightly warmed, knead in small amounts of vegetable shortening. Work it through the fondant gradually until the texture feels smooth and elastic again. For fondant that cracks when you try to roll it, food-grade glycerin is a stronger fix. Adding 2 to 3 teaspoons of glycerin per 2 pounds of fondant restores elasticity and helps prevent future cracking. Knead it in thoroughly until the fondant is uniformly soft.
Humidity: Too Much Is Just as Bad
While dry air hardens fondant, excess humidity creates the opposite problem. Sticky, sweaty fondant that won’t hold its shape. The sweet spot is a stable room between 68°F and 72°F with moderate humidity. If you’re decorating on a humid summer day, run a dehumidifier or air conditioner in your workspace. Cornstarch on your rolling surface can help absorb some excess moisture from the air, and working quickly reduces the time fondant is exposed to humid conditions.
If your fondant does get sticky from humidity, let it sit uncovered for a few minutes to dry slightly, then dust it lightly with cornstarch before continuing. Resist the urge to add more powdered sugar, which can change the flavor and make the fondant stiffer once it dries.