I once spent ten minutes stabbing a brick of brown sugar with a butter knife. It was December 23rd, I was making cookies for a holiday party, and the sugar had turned into something you could build a house with. The knife bent. The sugar laughed.

That was the day I learned brown sugar does not have to be this way. My aunt, who has baked more cookies than I have eaten, told me three tricks that keep brown sugar soft for months. I have not fought a sugar brick since.

Why brown sugar turns into a rock

Brown sugar is just white sugar with molasses mixed back in. When that molasses dries out, the sugar granules cement together. The fix is simple: keep moisture in, or add it back.

The refrigerator actually makes this worse — the cold air is dry and sucks moisture right out. Keep brown sugar at room temperature in a well-sealed container. Not the fridge. Never the fridge.

The marshmallow trick (my go-to)

Drop one or two regular marshmallows into your brown sugar container and seal it. The marshmallows act like little moisture sponges — they slowly release humidity into the sugar. Replace them when they get hard, which takes a couple of months.

I keep a bag of mini marshmallows in the pantry just for this. One marshmallow in a fresh bag of brown sugar, and it stays soft through the entire holiday baking season. My aunt swears by this and she has been doing it since the 1970s.

The terra cotta bear (old school, works forever)

You can buy a small terra cotta brown sugar saver — they look like little bears or discs — for about five bucks. Soak it in water for 20 minutes, dry the outside, then toss it in with your brown sugar. It slowly evaporates moisture into the container.

Re-soak it every few months. These things last basically forever. I have had mine for three years and it still works. The downside is remembering to re-soak it, which I forget about half the time.

The bread slice method (emergency fix)

If your sugar is already hard and you need it soft right now, put a slice of fresh bread on top of the sugar in a sealed container. Leave it overnight. The moisture from the bread transfers into the sugar. In the morning, toss the bread (it will be stale) and your sugar will be scoopable again.

For an even faster fix, microwave the hard sugar in a bowl covered with a damp paper towel for 20 seconds, then break it up with a fork. Repeat until soft. But use it right away — it will harden again as it cools.

The container matters more than you think

I used to clip the plastic bag shut with a chip clip and call it good. Wrong. Brown sugar needs an airtight container. A glass jar with a rubber gasket is ideal. A Tupperware with a snap-on lid works fine. Even a Ziploc bag with all the air squeezed out is better than the original packaging.

The one thing to avoid: those ceramic canisters with loose wooden lids. They look cute but they leak air. Your sugar will be concrete in a week.