How to Make Oven Sun-Dried Tomatoes (Step-by-Step)
To make oven-dried tomatoes, heat a conventional oven to 200°F (93°C), or its lowest setting, and check the temperature with an oven thermometer. Halve small tomatoes or slice larger ones ¼ inch (6 mm) thick. Arrange them cut-side up on a parchment-lined, rimmed pan and dry for about 6–10 hours, until leathery and pliable. Cool, then refrigerate or freeze.
A tomato is like a small water tank: the oven’s job is to let moisture escape slowly without scorching the outside. Oven-dried tomatoes are not dried by the sun, but a low oven can give you a similar chewy texture with more control over the process. The key is to judge each piece by its feel, not by the clock alone.
In my kitchen classes, I see cooks turn up the heat when drying takes longer than expected. That often gives the edges too much heat before the centers have dried. A steady low temperature, even cuts, and regular checks make the process easier to manage.
Material Setup and Tomato Preparation
Set up the right pan, oven, and tomatoes before drying begins. This helps the pieces dry at a similar rate and keeps the work simple. Use a rimmed, oven-safe metal sheet pan lined with parchment, and make sure the oven can hold a low temperature.
Choose the pan and check the oven
A rimmed sheet pan is a flat metal baking pan with a raised edge. The rim helps contain tomato juice, while the broad surface gives moisture room to escape. Stainless steel or aluminum pans work well when lined with parchment.
Use parchment as a barrier between the tomatoes and the metal, especially if you are adding acidic ingredients. Avoid reactive bare aluminum with acidic ingredients. Do not use glass or ceramic under a broiler or expose them to sudden temperature changes. This recipe does not need a broiler.
Set a conventional oven to 200°F (93°C). Oven dials can be off, and some ovens cycle above and below their set temperature. Place an oven thermometer where you can read it without leaving the door open for long. If the oven cannot hold 200°F, use its lowest setting and watch the tomatoes closely.
Wash, cut, and arrange the tomatoes
Choose ripe tomatoes that are firm enough to handle. Wash them under running water, dry them well, and remove stems and blemishes. Excess water on the surface adds drying time, so take a moment to pat the tomatoes dry.
Cut small tomatoes in half lengthwise. Cut larger tomatoes into slices about ¼ inch (6 mm) thick. Uniform pieces matter: pieces of similar size tend to finish at a similar time. If a large tomato has a very thick core, trim away some of it so the slice is more even.
Line the pan with parchment and arrange the tomatoes in one layer, cut-side up. Leave a little space between pieces so air can move around them. Crowding the pan can slow drying and make it harder to check individual pieces.
| Tomato shape | How to cut it | What to watch for |
|---|---|---|
| Small tomatoes | Halve lengthwise | Remove excess seeds only if they are loose and watery |
| Large tomatoes | Slice about ¼ inch (6 mm) thick | Keep slices as even as possible |
| Uneven or very thick pieces | Trim or cut again | Thick centers may need longer to dry |
Next step: Once the tomatoes are cut and arranged, season them lightly and put them in the preheated oven.
Oven-Drying Technique and Doneness
Slow drying removes moisture over several hours, so the tomatoes become chewy without needing a high oven temperature. Plan on about 6–10 hours, but use that range as a guide. Tomato size, water content, airflow, and oven accuracy all affect the time.
Season and dry in stages
Sprinkle the tomatoes lightly with salt. If you like, add a small amount of dried herbs. Do not add oil before drying. Oil coats the surface and is not needed for the drying process.
Put the pan in the oven and keep the temperature low. Every 2–3 hours, rotate the pan and switch its rack position if you are using more than one rack. Ovens can have warmer and cooler areas, so changing positions helps the pieces dry more evenly.
Try not to open the oven often. Each time you do, heat escapes and the drying time may increase. At the same time, do not leave the tomatoes unchecked for the full estimated range. Begin checking at 6 hours.
Do not raise the oven temperature to speed things up. The outside may scorch while the center stays wet. If a few pieces are ready before the rest, remove those pieces and leave the others to continue drying.
Check for the right texture
The finished tomatoes should feel leathery and pliable, not brittle. “Leathery” means they bend and feel dry on the surface, while still having some give. Check the thickest pieces, since they are most likely to hide moisture.
Look for these signs:
- The surface no longer looks wet or shiny with juice.
- There are no visible wet pockets in the flesh.
- A piece bends rather than snapping like a crisp chip.
- Thick pieces feel dry and flexible, not soft and watery in the center.
A small amount of softness is normal; the goal is not to turn every piece into a brittle chip. If you are unsure, keep the thicker pieces in the oven and check them again later. Remove finished pieces one at a time rather than waiting for every tomato to reach the same point.
| What you notice | What it may mean | What to do |
|---|---|---|
| Wet, glossy center | The piece needs more drying | Return it to the oven and check later |
| Dry surface, flexible flesh | The piece may be ready | Check for wet pockets, then remove |
| Brittle, dark edges | The piece may be over-dried or too hot | Check the oven temperature and remove it |
| Some pieces ready, others soft | Normal variation in size and water content | Remove ready pieces individually |
Next step: Cool the dried tomatoes completely on the pan, then refrigerate them promptly or freeze them.
Cleaning, Storage, and Pan Care
Cooling and storage matter because oven-drying does not make these tomatoes shelf-stable. Once the pieces have cooled, keep them cold or freeze them. Do not leave homemade tomatoes submerged in oil at room temperature, even if they look dry.
Cool and store safely
Let the tomatoes cool completely on the pan. Then transfer them to an airtight container and refrigerate at 40°F (4°C) or below. For conservative home handling, use refrigerated tomatoes within 4 days or freeze them.
You can freeze the tomatoes in a freezer-safe airtight container. If you want to use small amounts later, freeze them in portions that match your usual recipes. Thaw only what you need in the refrigerator.
Do not treat oil as a preserving step. Tomatoes packed in oil can support the growth of Clostridium botulinum if stored unrefrigerated. Keep oil-packed tomatoes refrigerated and use them within 4 days, or freeze them. For immediate serving, add oil just before eating.
Wash and store the pan
Let the sheet pan cool before washing it. Do not pour cold water onto a hot pan; a sudden temperature change can warp it. Wash the cooled pan with warm water and dish detergent, then dry it fully before putting it away.
Parchment helps keep tomato residue off the pan, but some juice may still reach the surface. If residue sticks, let the pan soak in warm, soapy water rather than scraping it while hot.
Next step: Keep a portion in the refrigerator for near-term use and freeze any amount you will not use within four days.
Serving and Dining Presentation
Oven-dried tomatoes have a concentrated, chewy texture that works well in simple meals. Add oil after drying if you want a softer, richer finish, or use the tomatoes as they are. For best texture, cut larger pieces into bite-size strips before serving.
Add them to everyday meals
Stir chopped tomatoes into warm pasta, or scatter them over salads and cooked grains. You can also add them to a sandwich or serve them alongside other ingredients on a plate. Their flavor is concentrated, so start with a small amount and add more to taste.
If you want a softer texture, drizzle the tomatoes with oil just before serving. Keep any remaining oil-packed tomatoes refrigerated and follow the same four-day use limit. Oil changes the texture, but it does not make the tomatoes safe to store at room temperature.
A useful habit is to write the preparation date on the storage container. That makes it easier to use refrigerated portions in time or move them to the freezer when needed.
Common problems and simple fixes
If the tomatoes are taking longer than expected, check the oven thermometer and the thickness of the pieces. A low oven may run cooler than its dial suggests, and thick pieces naturally take longer. Continue drying at a low setting rather than raising the heat.
If some pieces dry faster, remove them as they reach the leathery, pliable stage. Next time, cut the tomatoes more evenly and leave space between pieces. Those two changes often make the batch easier to manage.
Next step: Serve a few pieces fresh from the batch, then refrigerate or freeze the rest without delay.
Frequently Asked Questions
These quick answers cover the most common choices and checks for oven-dried tomatoes. Use the texture of the tomatoes and safe cold storage as your guides. Oven time is an estimate, not a guarantee that every piece is finished at once.
How long do tomatoes take to dry in the oven?
Plan on about 6–10 hours at 200°F (93°C). Check at six hours and remove pieces as they become leathery and pliable.
What temperature should I use?
Use 200°F (93°C) in a conventional oven. If your oven cannot hold that temperature, use its lowest setting and monitor the tomatoes.
Should I add oil before drying?
No. Arrange the tomatoes without oil, then add oil after drying if you want it for serving.
Do I need to remove the seeds?
No. Small tomatoes can be halved and large ones sliced without removing seeds. Trim away loose, watery seed pockets if you want, but it is not required.
Can I dry whole tomatoes?
This method is designed for halved small tomatoes or ¼-inch slices of larger tomatoes. Cutting them helps expose the flesh and supports more even drying.
How can I tell when the tomatoes are done?
They should be leathery and pliable, with no visible wet pockets. They do not need to be brittle.
Can I store homemade dried tomatoes at room temperature?
No. Refrigerate them promptly at 40°F (4°C) or below, use them within four days, or freeze them.
Is it safe to store tomatoes submerged in oil on the counter?
No. Oil is not a preservation step, and unrefrigerated oil-packed tomatoes can support Clostridium botulinum growth. Keep them refrigerated and use within four days, or freeze.
Can I use glass or ceramic instead of a sheet pan?
Use a rimmed, oven-safe metal pan lined with parchment for this method. Do not put glass or ceramic under a broiler or expose it to sudden temperature changes.
Why are some pieces still wet when others are done?
Tomatoes vary in size and water content, and oven heat can vary by rack position. Remove finished pieces individually and keep drying the thicker ones at a low temperature.
The method is simple: cut evenly, dry slowly, and check the texture instead of relying only on time. Once the tomatoes are cool, refrigerate them for up to four days or freeze them for later.
(This article was written by one of our staff writers, Daniel M. Whitaker. Visit our Meet the Team page.)
