How to Make Tomato Paste: A Step-by-Step Guide for Home Cooks
Unlock the full flavor of summer tomatoes with this essential homemade tomato paste guide.
Homemade tomato paste is a culinary treasure that can elevate recipes with bold, concentrated tomato flavor. Making your own tomato paste is not only a rewarding way to capture the sun-drenched taste of ripe tomatoes but also allows for total control over ingredients and quality. This guide explores the full process, from choosing the best tomatoes to proper storage, providing everything you need to craft delicious tomato paste at home.
Table of Contents
- Why Make Tomato Paste at Home?
- Best Tomatoes for Tomato Paste
- Preparing the Tomatoes
- Cooking Methods for Tomato Paste
- Seasoning & Optional Additions
- Reducing the Tomato Pulp
- How Much Tomato Paste Will I Get?
- How to Store Tomato Paste
- Tips, Troubleshooting & Common Questions
- Frequently Asked Questions
Why Make Tomato Paste at Home?
Store-bought tomato paste is convenient, but homemade tomato paste captures the true intensity and sweetness of ripe tomatoes, free from preservatives or added sugar. Making your own allows you to use in-season produce at its peak, control the ingredients, and experiment with flavors tailored to your cooking style. Homemade paste is thicker, richer, and often more healthful than commercial versions, making it an ideal pantry staple.
Best Tomatoes for Tomato Paste
Choosing the right tomato variety is crucial, as some are naturally meatier and less watery—ideal qualities for paste.
- Roma tomatoes: Firm, low-moisture, and traditional for paste
- Plum tomatoes: Similar qualities to Romas, with rich flavor
- Heirloom or beefsteak: Can be used, but expect longer cooking times due to higher water content
- Canned tomatoes or purée: In the off-season, canned crushed tomatoes or tomato purée provide a solid shortcut without sacrificing much flavor
Note: Avoid overripe or blemished tomatoes, as they can affect flavor and yield.
Preparing the Tomatoes
Proper preparation ensures smooth, flavorful paste. A detailed process is outlined below:
- Wash and check: Use only ripe, unblemished tomatoes.
- Core and cut: Remove stems and cut tomatoes into halves or quarters.
- Cook to soften: Place the tomatoes in a large pot with a pinch of salt and a drizzle of extra-virgin olive oil (if desired). Bring to a boil and cook until the tomatoes start to fall apart—about 10 minutes.
- Strain skins and seeds: Pass the cooked tomatoes through a food mill, sieve, or fine mesh strainer to remove the skins and seeds, collecting the purée in a large bowl.
After this, you are ready to reduce your purée into tomato paste.
Cooking Methods for Tomato Paste
Homemade tomato paste can be made using several methods depending on your kitchen equipment and time constraints. Each has unique benefits, but all share the goal of reducing moisture and intensifying the tomato flavor.
1. Oven Method
- Preheat the oven to 200°F (93°C).
- Spread the tomato purée onto a lightly oiled, rimmed baking sheet.
- Bake for 3–4 hours, stirring every 20–30 minutes to prevent burning and promote even thickening.
- The paste is done when deep red, thick, and sticky.
2. Stovetop Method
- Pour purée into a large, wide pot or Dutch oven.
- Simmer over medium-low heat, uncovered, stirring often to prevent scorching.
- This method may take several hours; check and stir every 15 minutes.
3. Combination Stovetop and Oven Method
- Start on the stovetop, simmering purée until reduced by about one-third.
- Transfer to a baking sheet and finish thickening in the oven as above.
4. Slow Cooker (Crockpot) Method
- Pour purée into the crockpot, set to lowest heat, and leave the lid off to allow moisture to evaporate.
- Once thickened, finish on ‘keep warm’ setting if desired.
- This is hands-off but takes longer; stir occasionally to avoid sticking.
Method Comparison Table
| Method | Pros | Cons | Time |
|---|---|---|---|
| Oven | Even heat, less likely to burn, easy to check | Occupies oven for hours | 3–4 hours |
| Stovetop | Quicker evaporation, controlled reduction | Requires frequent stirring to prevent burning | 2–4 hours |
| Combined | Efficient, reduces risk of burning, balances pros/cons | Extra transfer step | 3–4 hours |
| Crockpot | Hands-off, gentle heat | Slow, requires monitoring | 4–8 hours |
Seasoning & Optional Additions
Classic tomato paste is made with only tomatoes and salt. However, you may add a small amount of extra-virgin olive oil to enrich the flavor and texture (do not include oil if canning with a water bath). Some cooks add a pinch of sugar if the tomatoes are very acidic. Herbs and garlic are generally not recommended, as their flavors intensify and can become overpowering during reduction.
Reducing the Tomato Pulp
This is the most important (and longest) part of the process. Slow, consistent evaporation is key for coaxing out the paste’s concentrated taste and signature thick texture. Stir at regular intervals, scrape down sides, and check for any signs of burning.
The paste is ready when it holds its shape when mounded on a spoon, is shiny, and a deep brick-red color. Expect the final yield to be dramatically less than the starting amount (about 1 quart of tomatoes for every 2-3 tablespoons of paste).
How Much Tomato Paste Will I Get?
- 10 pounds (4.5 kg) fresh tomatoes yields about 18–20 ounces (2–2.5 cups) finished tomato paste.
- Canned tomatoes or purée will yield less due to initial water loss in processing.
How to Store Tomato Paste
Store homemade paste in small, airtight containers. Consider the following options:
- Refrigerator: Spoon paste into a glass jar, cover the surface with 1/2-inch olive oil, and refrigerate for up to 2–3 weeks.
- Freezer: Portion paste into ice cube trays, freeze, and transfer cubes to a freezer bag; keeps 6 months or longer.
- Canning (optional): For long-term shelf storage, use pressure canning (not water bath) and omit oil.
Tip: Always use clean utensils when removing paste to avoid spoilage.
Tips, Troubleshooting & Common Questions
- Don’t forget to stir: Paste burns quickly—regular stirring ensures even reduction and prevents scorching.
- Color and texture: Finished paste should be dark, thick, and glossy.
- Use non-reactive cookware: Stainless steel or enameled pots prevent unwanted metallic tastes.
- If it’s too thin: Continue simmering or bake longer until desired texture is reached.
- No food mill? Use a fine mesh sieve and push the tomato through with a spatula for similar results.
- Don’t add herbs or garlic in paste: Their flavors intensify and can become bitter—add them directly to recipes when using the paste.
- For leftovers: Try making small batches using leftover tomato scraps or skins (requires additional steps for smoothness).
Frequently Asked Questions
Q: What are the best tomatoes for making paste?
A: The best tomatoes are Roma or plum tomatoes due to their low water content and meaty texture. In a pinch, use canned crushed tomatoes or tomato purée.
Q: Why does tomato paste take so long to cook?
A: Evaporating most of the water intensifies the tomato flavor and thickens the mixture. Rushing this step will produce watery paste with less flavor.
Q: Can I freeze homemade tomato paste?
A: Absolutely! Freeze in small portions (such as ice cube trays) and use as needed. Freezing preserves flavor and texture best.
Q: How do I keep tomato paste from spoiling in the fridge?
A: Cover the surface of the paste in the jar with 1/2 inch of olive oil. This seals out air and prolongs freshness for up to 3 weeks.
Q: Can I can homemade tomato paste for pantry storage?
A: Yes, but it must be processed in a pressure canner to be food safe, and made without oil. For small batches, freezing is simpler and safer.
How to Use Tomato Paste in the Kitchen
Homemade tomato paste is far more than a pizza sauce staple. Try it to deepen flavor in:
- Meat sauces and ragù
- Soups and stews
- Casseroles
- Homemade ketchup and barbecue sauces
- Braising liquids
Summary and Final Tips for Perfect Tomato Paste
- Use only high-quality, ripe tomatoes for best results.
- Strain out seeds and skins for a smoother, more concentrated paste.
- Keep heat low and slow—patience yields richer flavor.
- Remember to stir regularly and watch for burning.
- Store in small, airtight containers and top with olive oil in the fridge or portion in the freezer.
