Yes, sweet and sour sauce freezes well, homemade or opened store-bought. Use it within about 3 months for the best flavour. The only catch: sauces thickened with cornstarch can turn thin or a little spongy after thawing. Whisking them while reheating fixes that.
How to freeze it
- Cool it completely.
- Portion it: ice cube trays are handy (one cube is about 2 tablespoons), or use small containers.
- Once the cubes are frozen, move them to a freezer bag, squeeze out the air and label it with the date.
- Leave a little headspace in containers, because the sauce expands as it freezes.
How to thaw and reheat it
- Thaw it in the fridge overnight, or add frozen cubes straight to a hot pan.
- Reheat it gently while whisking. If it’s thin, simmer it for a minute or two. If it’s still thin, whisk in a little cornstarch mixed with cold water and bring it back to a simmer.
- Reheat it until it’s bubbling if you’re serving it on its own.
How long does it keep in the fridge?
| Sauce | Fridge |
|---|---|
| Homemade | About 1 week, covered |
| Store-bought, opened | Check the label. It’s often a few weeks, refrigerated |
| Takeaway sauce packets | Follow the packet. Unopened ones are usually shelf-stable |
Throw it out if it smells fermented or off, or shows any mold.
Quick answers
Can I freeze sweet and sour chicken with the sauce?
Yes, but the batter on the chicken goes soft. Reheat it in the oven to crisp it, or freeze the sauce and the chicken separately.
Does freezing change the taste?
Not much. Vinegar and sugar keep it stable. You may want to add a splash of vinegar or a pinch of sugar to brighten it after thawing.