A word from Denise
Two damp paper towels and two minutes will get you back to baking. After that, seal the bag up tight every time you close it.
Every tip here is checked against the sources listed at the bottom.

What works For sugar you need now, cover it with two damp paper towels in a covered bowl and microwave it on high for 1 1/2 to 2 minutes. For the whole bag, seal it in a container with a slice of bread or another damp helper for about 2 days.
Microwaved sugar comes out hot and soft, but it hardens again as it cools. So measure out only what your recipe calls for, and leave the rest of the bag for the slow method in Steps 7 to 9.
You may have heard you can do this in 30 seconds. We could not find a sugar maker that says so. Domino and C&H both say 1 1/2 to 2 minutes, and that is the time this page uses.
Chip or scoop out the amount your recipe calls for and put it in a glass or ceramic bowl. Skip old margarine tubs and yogurt cartons, because USDA says those are not made for cooking in the microwave.
Run two paper towels under the tap, then wring them out until they are wet but not dripping.
What it looks like: towels that feel wet to the touch, with no water running off them.
Spread the damp towels right on top of the sugar so they cover it.
Stretch plastic wrap tightly across the rim of the bowl, or use a microwave-safe lid. The towels sit between the sugar and the cover, so the wrap does not touch the sugar itself.
What it looks like: a snug cover over the top, with the paper towels underneath it.
Start with 1 1/2 minutes and check it. If it is still hard, give it up to 30 seconds more. Domino says microwaves vary in power, so your time may need a little adjusting.
What it looks like: sugar that gives when you press it with a fork, instead of a hard block.
Peel the cover back carefully, because hot steam builds up under it. Work the sugar with a fork to break up the clumps, and add it to your recipe while it is still warm and soft.
What it looks like: loose, soft sugar instead of a hard block.
When you are not in a hurry, tip the rest of the hard sugar into a container with a tight lid.
Pick one damp helper. You can use plastic wrap or foil topped with two damp paper towels, or a terra cotta disk dampened the way its package says. One or two slices of bread or one or two large marshmallows work too. Set it in with the sugar and close the lid tight.
Take out the bread, towel or disk after about 2 days, or as soon as the sugar has softened. Break up the sugar with a fork and seal the container again.
What it looks like: sugar that is soft all the way through.
If the sugar is still giving you trouble, one of these is usually why.
We may earn a small fee from these links. It never changes the picks or your price.
It is an airtight container and a damp helper in one. The Brown Sugar ProKeeper+ was $9.82 at Walmart.com on 11/7/2026.
Drop one into any tight container you already own. Packs of 2 to 4 ran $9.95 to $12.99 at Walmart.com on 11/7/2026.
Paper towels and a slice of bread do the job for free. If you bake a lot, these help keep the sugar soft.
The free Kitchen and Laundry Rescue Guide puts our checked kitchen fixes on a few printable pages. Stick it on the fridge, and the answer is there next time.

Here is what is going on. Brown sugar keeps more molasses than white sugar, and Domino says that gives it a softer texture. When the moisture in the sugar evaporates, the sugar sets up hard.
Nothing has gone bad. The sugar is just thirsty, and every method on this page gives the moisture back. Think of a kitchen sponge left on the sink overnight. It dries out stiff, but a little water makes it soft again.
The microwave does it fast with steam from the towels. The slow way does it with a slice of bread or a damp disk that lends its water to the sugar over a couple of days.
So many of us know this moment. The butter is softened, the eggs are cracked, and the spoon bounces right off a brick of brown sugar. It is tempting to toss the bag, but that sugar is perfectly good.
A word from Denise
Two damp paper towels and two minutes will get you back to baking. After that, seal the bag up tight every time you close it.
We could not find a maker that says so. Domino and C&H both say to microwave it for 1 1/2 to 2 minutes under damp paper towels.
Yes. Hard sugar has only dried out. USDA’s FoodKeeper says sugar never spoils, with best quality within about 2 years of opening. Domino says brown sugar is best within 6 months of purchase and opening.
No. Domino says not to refrigerate it. Keep it in a tight container in a cool spot, and freeze it only if your home is very dry or you plan to keep it a long time.
Yes. Domino and C&H both list one or two slices of bread as a slow method. Take it out after about 2 days.
Sources opened and checked on November 7, 2026.
Every claim on this page, the source behind it and what the check found. Kept open for anyone who wants to look under the hood.
| Claim | Source | What the check found |
|---|---|---|
| Brown sugar hardens when its moisture evaporates; softening returns moisture | Sources 1, 2 | Matches the source. |
| Microwave: amount needed, microwave-safe bowl, two wet (not dripping) paper towels over the sugar, bowl covered tightly with plastic wrap, high for 1 1/2 to 2 minutes, fork, use right away | Sources 1, 2 | Matches the source. |
| It hardens again as it cools; microwave only what you need; microwaves vary in power | Sources 1, 2 | Matches the source. |
| “30 seconds” (the assigned title) | No maker or agency page found; both makers say 1 1/2 to 2 minutes | Matches the source. As “we could not find”; dropped from title and steps |
| “Start with 1 1/2 minutes, then up to 30 seconds more” | Sources 1, 2 (1 1/2 to 2 minutes) | Matches the source (within the makers’ range). |
| Plastic wrap should not touch food in the microwave; steam vents from under the cover | Source 4 | Matches the source. |
| Use microwave-safe glass or ceramic; no margarine tubs or yogurt cartons | Source 4 | Matches the source. |
| Wrap goes across the rim so the towels sit between it and the sugar | Source 1 (towels on the sugar, bowl covered) read with Source 4 (wrap off the food) | Matches the source. |
| Slow method: sealed container with wrap or foil plus two damp towels, a dampened terra cotta disk, 1 or 2 slices of bread, or 1 or 2 large marshmallows; remove after about 2 days or once softened; fork apart; reseal | Sources 1, 2 | Matches the source. |
| Terra cotta disk “dampened the way its package says” | Source 1 says “dampened”; no soak time given | Matches the source (soak time left out on purpose). |
| Oven: oven-safe pan, 250°F, until soft, watch carefully, it is hot, use right away | Sources 1, 2 | Matches the source. No oven time is given by either maker, so none is given here |
| Store with a tight-fitting lid or in a moisture-proof bag; do not refrigerate; freeze if very dry; best within 6 months of purchase and opening | Source 1 | Matches the source. |
| Brown sugar keeps more molasses than other sugars, giving a softer texture | Source 3 | Matches the source. |
| FoodKeeper: brown sugar keeps indefinitely; best quality within 2 years of opening | Source 5 | Matches the source. |
| Sponge comparison | Everyday picture for Sources 1 and 2 (hardening is lost moisture; softening returns it) | Matches the source (comparison for a sourced fact). |
| Prices: Brown Sugar ProKeeper+ $9.82; terra cotta disks 2 to 4 pack $9.95 to $12.99 | Source 6, read on November 7, 2026 | Matches the source. Dated Walmart.com online. Target prices cut (Target pages would not load); Target links kept with no price |