The Best Way to Freeze Leftover Tomato Paste Without Wasting It

Freeze leftover tomato paste in measured small portions on a lined tray, then transfer the firm portions to a labeled freezer bag. One-tablespoon portions are convenient because many sauces, soups, and skillet meals call for only a little paste. You can usually add a frozen portion directly to a cooked recipe.

Freezing the remainder shortly after opening is easier than trying to remember an almost-full can at the back of the refrigerator.

Why small portions work

Tomato paste is concentrated, so a recipe may use only part of a can. Freezing the whole remainder in one solid block leaves you with the same portioning problem later. Measured portions let you take what the recipe needs without thawing more than necessary.

What you need

Gather the sound leftover paste, a measuring tablespoon, parchment or a suitable silicone freezer mold, a tray that fits in the freezer, and a freezer-safe bag or container. Have a label ready. Use clean utensils and check the product’s instructions after opening.

Step-by-step tray method

1. Assess the paste promptly

Freeze paste that has been handled cleanly and is still within its safe refrigerated storage period. Do not freeze an old container showing mold or an off smell. Freezing preserves a usable ingredient; it does not repair spoilage.

2. Line a tray

Set parchment on a small tray or plate that can sit flat in the freezer. Choose one with enough room to separate portions. Do not fill an already crowded freezer with a tray that cannot stay level.

3. Measure portions

Spoon paste into level tablespoon-sized mounds, leaving space between them. Use two spoons to release the sticky paste if necessary. Measure consistently so a future recipe does not get an unknown oversized lump.

4. Freeze until firm

Put the tray in the freezer until the mounds are firm enough to lift without smearing. The time depends on their size and freezer conditions. This is an initial portioning step, not a reason to leave paste uncovered for days.

5. Bag and label

Move the portions into a freezer bag or airtight freezer container. Remove excess air gently and seal. Label the date and the amount per portion. Return the bag to the freezer promptly.

The mold alternative

A food-safe silicone mold intended for freezing can create neat portions. Check its actual cavity size rather than assuming every cube equals one tablespoon. Once frozen, release the portions into a bag. Keeping them in an uncovered mold exposes them to odors and drying.

Using the frozen paste

For soup or a sauce, add the portion directly to the hot cooking mixture and stir until it blends. If the recipe asks you to sauté paste in oil first, use gentle heat while the frozen portion softens, then follow the browning step. Do not drop frozen paste into excessively hot fat where moisture can sputter.

If a recipe needs paste cold, thaw the portion in the refrigerator in a clean covered container. Use it promptly. A frozen dollop is not a ready-to-eat topping simply because it came from a can.

Best-quality storage

Keep the portions at 0°F and use within about 2–3 months for good flavor and convenience. This is a practical quality target, not an exact safety deadline for continuously frozen food. A tight package limits surface drying. Use the oldest portions first and reseal after removing what you need.

Common mistakes

Unmeasured mounds make later recipes harder to reproduce. Bagging soft paste creates a sticky block. Leaving portions uncovered leads to dry surfaces and freezer odors. Adding a frozen portion to a very small pan without reducing heat can scorch one side before the center softens.

Refrigerator versus freezer

For the next day or two, a clean covered refrigerator container may be enough, subject to the label’s guidance. Transfer leftovers out of an opened can for convenient covered storage. If you have no immediate plan, freeze small portions early instead of waiting until the paste is questionable.

Ways to use the portions

Add paste to chili, meat sauce, lentil soup, or a braised dish. It can deepen flavor, but a little often goes a long way. Start with the amount the recipe specifies. Paste is more concentrated than tomato sauce, so it is not an equal-volume substitute.

Frequently asked questions

Can I freeze an unopened can?

This method is for opened leftovers. Store unopened cans according to their label rather than putting the can in the freezer.

Can I freeze paste from a tube?

Yes, if it is sound and appropriate under the label guidance, but tubes are designed to let you dispense small amounts and reseal. Freezing may be unnecessary if you use it within its advised period.

Can I scrape mold off tomato paste?

No. Discard moldy paste rather than freezing what remains.

Do I need oil in the portions?

No. Plain paste freezes in portions without added oil, keeping it more flexible for future recipes.

References: USDA freezing guidance and USDA mold guidance.